SlideShare a Scribd company logo
CHAPTER 2: FUNCTIONS,
EQUATIONS, AND GRAPHS
2.1 Relations and Graphs
RELATIONS
   A relation is a set of pairs of input and output values.
     There   are four ways to represent relations
EXAMPLE: REPRESENTING
RELATIONS
   The monthly average water temperature of the
    Gulf of Mexico in Key West, Florida varies during
    the year. In January, the average water
    temperature is 69°F, in February, 70°F, in
    March, 75°F and in April, 78°F. What is one way
    to represent this relation?
DEFINITIONS
 The domain of a relation is the set of inputs,
  also called the x-coordinates, of the ordered pairs.
 The range is the set of outputs, also called the y-
  coordinates, of the ordered pairs.
EXAMPLE: FIND THE DOMAIN
AND RANGE OF EACH.
FUNCTIONS
   A function is a relation in which each element of
    the domain corresponds to exactly one element of
    the range.
     When   using a mapping diagram to represent a
      relation, a function has only one arrow from each
      element of the domain.
          Example:
EXAMPLE: IS THE RELATION
A FUNCTION?
THE VERTICAL LINE TEST
   The vertical line test is used to test whether a
    graph represents a function.

   The vertical line test states that if any vertical
    line passes through more than one point on the
    graph of a relation, then the relation is not a
    function.
EXAMPLE: USE THE VERTICAL
LINE TEST. WHICH GRAPH(S)
REPRESENTS A FUNCTION?
FUNCTIONS
   A function rule is an equation that represents
    an output value in terms of an input value.
     We   write a function rule in function notation.
EXAMPLE: USING FUNCTION
NOTATION
   For   f ( x ) = −2 x, + 5   what is the output for

                       1
    the inputs: −3,0,&
                       4
EXAMPLE: USING FUNCTION
NOTATION
   For   f ( x ) = −4 x + 1   ,what is the output for

    the inputs:   −2,0,5
EXAMPLE:
   Tickets to a concert are available online for $35 each
    plus a handling fee of $2.50. The total cost is a
    function of the number of tickets bought. What
    function rule models the cost of the concert tickets?
    Evaluate the function for 4 tickets.
EXAMPLE
   You are buying bottles of a sports drink for a
    softball team. Each bottle costs $1.19. What
    function rule models the cost of a purchase.
    Evaluate the function for 15 bottles.

More Related Content

Similar to 2.1

2.1 Relations and Functions
2.1 Relations and Functions2.1 Relations and Functions
2.1 Relations and Functions
leblance
 
Alg II 2-1 Relations and Functions
Alg II 2-1 Relations and FunctionsAlg II 2-1 Relations and Functions
Alg II 2-1 Relations and Functions
jtentinger
 
2.3 Functions
2.3 Functions2.3 Functions
2.3 Functions
smiller5
 
Chapter on Functions and Graphs.ppt
Chapter on Functions and Graphs.pptChapter on Functions and Graphs.ppt
Chapter on Functions and Graphs.ppt
PhongLan30
 
LANGUAGE-OF-RELATIONS-AND-FUNCTIONS.pptx
LANGUAGE-OF-RELATIONS-AND-FUNCTIONS.pptxLANGUAGE-OF-RELATIONS-AND-FUNCTIONS.pptx
LANGUAGE-OF-RELATIONS-AND-FUNCTIONS.pptx
JasonTagapanGulla
 
Relations and Functions Power Point.ppt
Relations and Functions Power Point.pptRelations and Functions Power Point.ppt
Relations and Functions Power Point.ppt
rich_26
 
Relations and functions power point
Relations and functions power pointRelations and functions power point
Relations and functions power point
Melody01082019
 
L1_Functions_and_Relations.ppt
L1_Functions_and_Relations.pptL1_Functions_and_Relations.ppt
L1_Functions_and_Relations.ppt
PatzAlzateParaguya
 
(8) Chapter 4 Study Guide
(8) Chapter 4 Study Guide(8) Chapter 4 Study Guide
(8) Chapter 4 Study Guide
wzuri
 
E212d9a797dbms chapter3 b.sc2 (2)
E212d9a797dbms chapter3 b.sc2 (2)E212d9a797dbms chapter3 b.sc2 (2)
E212d9a797dbms chapter3 b.sc2 (2)
Mukund Trivedi
 
E212d9a797dbms chapter3 b.sc2 (1)
E212d9a797dbms chapter3 b.sc2 (1)E212d9a797dbms chapter3 b.sc2 (1)
E212d9a797dbms chapter3 b.sc2 (1)
Mukund Trivedi
 
E212d9a797dbms chapter3 b.sc2
E212d9a797dbms chapter3 b.sc2E212d9a797dbms chapter3 b.sc2
E212d9a797dbms chapter3 b.sc2
Mukund Trivedi
 
Lesson 2 1
Lesson 2 1Lesson 2 1
Lesson 2 1
chrismac47
 
L1_Functions_and_Relations.ppt
L1_Functions_and_Relations.pptL1_Functions_and_Relations.ppt
L1_Functions_and_Relations.ppt
rich_26
 
L1_Functions_and_Relations.ppt
L1_Functions_and_Relations.pptL1_Functions_and_Relations.ppt
L1_Functions_and_Relations.ppt
roelmahilumII
 
L1_Functions_and_Relations.ppt
L1_Functions_and_Relations.pptL1_Functions_and_Relations.ppt
L1_Functions_and_Relations.ppt
aimeedurano
 
L1_Functions_and_Relations in mathematics
L1_Functions_and_Relations in mathematicsL1_Functions_and_Relations in mathematics
L1_Functions_and_Relations in mathematics
SusanNarvas1
 
L1_Functions_and_Relations.pptx
L1_Functions_and_Relations.pptxL1_Functions_and_Relations.pptx
L1_Functions_and_Relations.pptx
AnnKimberlyBrosas
 
Lesson 1 functions as models
Lesson 1 functions as modelsLesson 1 functions as models
Lesson 1 functions as models
AddisonPascua
 
Group H Presentation.pptx
Group H Presentation.pptxGroup H Presentation.pptx
Group H Presentation.pptx
StudyvAbhi
 

Similar to 2.1 (20)

2.1 Relations and Functions
2.1 Relations and Functions2.1 Relations and Functions
2.1 Relations and Functions
 
Alg II 2-1 Relations and Functions
Alg II 2-1 Relations and FunctionsAlg II 2-1 Relations and Functions
Alg II 2-1 Relations and Functions
 
2.3 Functions
2.3 Functions2.3 Functions
2.3 Functions
 
Chapter on Functions and Graphs.ppt
Chapter on Functions and Graphs.pptChapter on Functions and Graphs.ppt
Chapter on Functions and Graphs.ppt
 
LANGUAGE-OF-RELATIONS-AND-FUNCTIONS.pptx
LANGUAGE-OF-RELATIONS-AND-FUNCTIONS.pptxLANGUAGE-OF-RELATIONS-AND-FUNCTIONS.pptx
LANGUAGE-OF-RELATIONS-AND-FUNCTIONS.pptx
 
Relations and Functions Power Point.ppt
Relations and Functions Power Point.pptRelations and Functions Power Point.ppt
Relations and Functions Power Point.ppt
 
Relations and functions power point
Relations and functions power pointRelations and functions power point
Relations and functions power point
 
L1_Functions_and_Relations.ppt
L1_Functions_and_Relations.pptL1_Functions_and_Relations.ppt
L1_Functions_and_Relations.ppt
 
(8) Chapter 4 Study Guide
(8) Chapter 4 Study Guide(8) Chapter 4 Study Guide
(8) Chapter 4 Study Guide
 
E212d9a797dbms chapter3 b.sc2 (2)
E212d9a797dbms chapter3 b.sc2 (2)E212d9a797dbms chapter3 b.sc2 (2)
E212d9a797dbms chapter3 b.sc2 (2)
 
E212d9a797dbms chapter3 b.sc2 (1)
E212d9a797dbms chapter3 b.sc2 (1)E212d9a797dbms chapter3 b.sc2 (1)
E212d9a797dbms chapter3 b.sc2 (1)
 
E212d9a797dbms chapter3 b.sc2
E212d9a797dbms chapter3 b.sc2E212d9a797dbms chapter3 b.sc2
E212d9a797dbms chapter3 b.sc2
 
Lesson 2 1
Lesson 2 1Lesson 2 1
Lesson 2 1
 
L1_Functions_and_Relations.ppt
L1_Functions_and_Relations.pptL1_Functions_and_Relations.ppt
L1_Functions_and_Relations.ppt
 
L1_Functions_and_Relations.ppt
L1_Functions_and_Relations.pptL1_Functions_and_Relations.ppt
L1_Functions_and_Relations.ppt
 
L1_Functions_and_Relations.ppt
L1_Functions_and_Relations.pptL1_Functions_and_Relations.ppt
L1_Functions_and_Relations.ppt
 
L1_Functions_and_Relations in mathematics
L1_Functions_and_Relations in mathematicsL1_Functions_and_Relations in mathematics
L1_Functions_and_Relations in mathematics
 
L1_Functions_and_Relations.pptx
L1_Functions_and_Relations.pptxL1_Functions_and_Relations.pptx
L1_Functions_and_Relations.pptx
 
Lesson 1 functions as models
Lesson 1 functions as modelsLesson 1 functions as models
Lesson 1 functions as models
 
Group H Presentation.pptx
Group H Presentation.pptxGroup H Presentation.pptx
Group H Presentation.pptx
 

More from leblance

Parent night contact&survey
Parent night contact&surveyParent night contact&survey
Parent night contact&survey
leblance
 
7.1
7.17.1
7.2
7.27.2
10.3 part 1
10.3 part 110.3 part 1
10.3 part 1leblance
 
10.2
10.210.2
10.2
leblance
 
10.1 part2
10.1 part210.1 part2
10.1 part2
leblance
 
10.1 part 1
10.1 part 110.1 part 1
10.1 part 1
leblance
 
Ch 9 practice exam
Ch 9 practice examCh 9 practice exam
Ch 9 practice examleblance
 
5.4 synthetic division
5.4 synthetic division5.4 synthetic division
5.4 synthetic division
leblance
 
5.4 long division
5.4 long division5.4 long division
5.4 long division
leblance
 
5.3
5.35.3
9.3 Part 1
9.3 Part 19.3 Part 1
9.3 Part 1
leblance
 
9.1 9.2 9.3 using the graph calc
9.1 9.2 9.3 using the graph calc9.1 9.2 9.3 using the graph calc
9.1 9.2 9.3 using the graph calc
leblance
 
5.2
5.25.2
5.1 part 2
5.1 part 25.1 part 2
5.1 part 2
leblance
 
9.1
9.19.1
9.2 lin reg coeff of det
9.2 lin reg coeff of det9.2 lin reg coeff of det
9.2 lin reg coeff of det
leblance
 
8.4
8.48.4
8.3 critical region
8.3 critical region8.3 critical region
8.3 critical region
leblance
 
8.3 critical region
8.3 critical region8.3 critical region
8.3 critical region
leblance
 

More from leblance (20)

Parent night contact&survey
Parent night contact&surveyParent night contact&survey
Parent night contact&survey
 
7.1
7.17.1
7.1
 
7.2
7.27.2
7.2
 
10.3 part 1
10.3 part 110.3 part 1
10.3 part 1
 
10.2
10.210.2
10.2
 
10.1 part2
10.1 part210.1 part2
10.1 part2
 
10.1 part 1
10.1 part 110.1 part 1
10.1 part 1
 
Ch 9 practice exam
Ch 9 practice examCh 9 practice exam
Ch 9 practice exam
 
5.4 synthetic division
5.4 synthetic division5.4 synthetic division
5.4 synthetic division
 
5.4 long division
5.4 long division5.4 long division
5.4 long division
 
5.3
5.35.3
5.3
 
9.3 Part 1
9.3 Part 19.3 Part 1
9.3 Part 1
 
9.1 9.2 9.3 using the graph calc
9.1 9.2 9.3 using the graph calc9.1 9.2 9.3 using the graph calc
9.1 9.2 9.3 using the graph calc
 
5.2
5.25.2
5.2
 
5.1 part 2
5.1 part 25.1 part 2
5.1 part 2
 
9.1
9.19.1
9.1
 
9.2 lin reg coeff of det
9.2 lin reg coeff of det9.2 lin reg coeff of det
9.2 lin reg coeff of det
 
8.4
8.48.4
8.4
 
8.3 critical region
8.3 critical region8.3 critical region
8.3 critical region
 
8.3 critical region
8.3 critical region8.3 critical region
8.3 critical region
 

Recently uploaded

From Swing Music to Big Band Fame_ 5 Iconic Artists.pptx
From Swing Music to Big Band Fame_ 5 Iconic Artists.pptxFrom Swing Music to Big Band Fame_ 5 Iconic Artists.pptx
From Swing Music to Big Band Fame_ 5 Iconic Artists.pptx
Swing Street Radio
 
原版制作(Mercer毕业证书)摩斯大学毕业证在读证明一模一样
原版制作(Mercer毕业证书)摩斯大学毕业证在读证明一模一样原版制作(Mercer毕业证书)摩斯大学毕业证在读证明一模一样
原版制作(Mercer毕业证书)摩斯大学毕业证在读证明一模一样
mul1kv5w
 
The Gallery of Shadows, In the heart of a bustling city
The Gallery of Shadows, In the heart of a bustling cityThe Gallery of Shadows, In the heart of a bustling city
The Gallery of Shadows, In the heart of a bustling city
John Emmett
 
Barbie Movie Review - The Astras.pdfffff
Barbie Movie Review - The Astras.pdfffffBarbie Movie Review - The Astras.pdfffff
Barbie Movie Review - The Astras.pdfffff
theastras43
 
Modern Radio Frequency Access Control Systems: The Key to Efficiency and Safety
Modern Radio Frequency Access Control Systems: The Key to Efficiency and SafetyModern Radio Frequency Access Control Systems: The Key to Efficiency and Safety
Modern Radio Frequency Access Control Systems: The Key to Efficiency and Safety
AITIX LLC
 
Unveiling Paul Haggis Shaping Cinema Through Diversity. .pdf
Unveiling Paul Haggis Shaping Cinema Through Diversity. .pdfUnveiling Paul Haggis Shaping Cinema Through Diversity. .pdf
Unveiling Paul Haggis Shaping Cinema Through Diversity. .pdf
kenid14983
 
Everything You Need to Know About IPTV Ireland.pdf
Everything You Need to Know About IPTV Ireland.pdfEverything You Need to Know About IPTV Ireland.pdf
Everything You Need to Know About IPTV Ireland.pdf
Xtreame HDTV
 
哪里买(osu毕业证书)美国俄勒冈州立大学毕业证双学位证书原版一模一样
哪里买(osu毕业证书)美国俄勒冈州立大学毕业证双学位证书原版一模一样哪里买(osu毕业证书)美国俄勒冈州立大学毕业证双学位证书原版一模一样
哪里买(osu毕业证书)美国俄勒冈州立大学毕业证双学位证书原版一模一样
9u08k0x
 
The Enigmatic Portrait, In the heart of a sleepy town
The Enigmatic Portrait, In the heart of a sleepy townThe Enigmatic Portrait, In the heart of a sleepy town
The Enigmatic Portrait, In the heart of a sleepy town
John Emmett
 
Snoopy boards the big bow wow musical __
Snoopy boards the big bow wow musical __Snoopy boards the big bow wow musical __
Snoopy boards the big bow wow musical __
catcabrera
 
高仿(nyu毕业证书)美国纽约大学毕业证文凭毕业证原版一模一样
高仿(nyu毕业证书)美国纽约大学毕业证文凭毕业证原版一模一样高仿(nyu毕业证书)美国纽约大学毕业证文凭毕业证原版一模一样
高仿(nyu毕业证书)美国纽约大学毕业证文凭毕业证原版一模一样
9u08k0x
 
From Teacher to OnlyFans: Brianna Coppage's Story at 28
From Teacher to OnlyFans: Brianna Coppage's Story at 28From Teacher to OnlyFans: Brianna Coppage's Story at 28
From Teacher to OnlyFans: Brianna Coppage's Story at 28
get joys
 
Leonardo DiCaprio House: A Journey Through His Extravagant Real Estate Portfolio
Leonardo DiCaprio House: A Journey Through His Extravagant Real Estate PortfolioLeonardo DiCaprio House: A Journey Through His Extravagant Real Estate Portfolio
Leonardo DiCaprio House: A Journey Through His Extravagant Real Estate Portfolio
greendigital
 
The Evolution of the Leonardo DiCaprio Haircut: A Journey Through Style and C...
The Evolution of the Leonardo DiCaprio Haircut: A Journey Through Style and C...The Evolution of the Leonardo DiCaprio Haircut: A Journey Through Style and C...
The Evolution of the Leonardo DiCaprio Haircut: A Journey Through Style and C...
greendigital
 
Authenticity in Motion Pictures: How Steve Greisen Retains Real Stories
Authenticity in Motion Pictures: How Steve Greisen Retains Real StoriesAuthenticity in Motion Pictures: How Steve Greisen Retains Real Stories
Authenticity in Motion Pictures: How Steve Greisen Retains Real Stories
Steve Greisen
 
Orpah Winfrey Dwayne Johnson: Titans of Influence and Inspiration
Orpah Winfrey Dwayne Johnson: Titans of Influence and InspirationOrpah Winfrey Dwayne Johnson: Titans of Influence and Inspiration
Orpah Winfrey Dwayne Johnson: Titans of Influence and Inspiration
greendigital
 
Christian Louboutin: Innovating with Red Soles
Christian Louboutin: Innovating with Red SolesChristian Louboutin: Innovating with Red Soles
Christian Louboutin: Innovating with Red Soles
get joys
 
DIGIDEVTV A New area of OTT Distribution
DIGIDEVTV  A New area of OTT DistributionDIGIDEVTV  A New area of OTT Distribution
DIGIDEVTV A New area of OTT Distribution
joeqsm
 
The Unbelievable Tale of Dwayne Johnson Kidnapping: A Riveting Saga
The Unbelievable Tale of Dwayne Johnson Kidnapping: A Riveting SagaThe Unbelievable Tale of Dwayne Johnson Kidnapping: A Riveting Saga
The Unbelievable Tale of Dwayne Johnson Kidnapping: A Riveting Saga
greendigital
 
定制(uow毕业证书)卧龙岗大学毕业证文凭学位证书原版一模一样
定制(uow毕业证书)卧龙岗大学毕业证文凭学位证书原版一模一样定制(uow毕业证书)卧龙岗大学毕业证文凭学位证书原版一模一样
定制(uow毕业证书)卧龙岗大学毕业证文凭学位证书原版一模一样
0md20cgg
 

Recently uploaded (20)

From Swing Music to Big Band Fame_ 5 Iconic Artists.pptx
From Swing Music to Big Band Fame_ 5 Iconic Artists.pptxFrom Swing Music to Big Band Fame_ 5 Iconic Artists.pptx
From Swing Music to Big Band Fame_ 5 Iconic Artists.pptx
 
原版制作(Mercer毕业证书)摩斯大学毕业证在读证明一模一样
原版制作(Mercer毕业证书)摩斯大学毕业证在读证明一模一样原版制作(Mercer毕业证书)摩斯大学毕业证在读证明一模一样
原版制作(Mercer毕业证书)摩斯大学毕业证在读证明一模一样
 
The Gallery of Shadows, In the heart of a bustling city
The Gallery of Shadows, In the heart of a bustling cityThe Gallery of Shadows, In the heart of a bustling city
The Gallery of Shadows, In the heart of a bustling city
 
Barbie Movie Review - The Astras.pdfffff
Barbie Movie Review - The Astras.pdfffffBarbie Movie Review - The Astras.pdfffff
Barbie Movie Review - The Astras.pdfffff
 
Modern Radio Frequency Access Control Systems: The Key to Efficiency and Safety
Modern Radio Frequency Access Control Systems: The Key to Efficiency and SafetyModern Radio Frequency Access Control Systems: The Key to Efficiency and Safety
Modern Radio Frequency Access Control Systems: The Key to Efficiency and Safety
 
Unveiling Paul Haggis Shaping Cinema Through Diversity. .pdf
Unveiling Paul Haggis Shaping Cinema Through Diversity. .pdfUnveiling Paul Haggis Shaping Cinema Through Diversity. .pdf
Unveiling Paul Haggis Shaping Cinema Through Diversity. .pdf
 
Everything You Need to Know About IPTV Ireland.pdf
Everything You Need to Know About IPTV Ireland.pdfEverything You Need to Know About IPTV Ireland.pdf
Everything You Need to Know About IPTV Ireland.pdf
 
哪里买(osu毕业证书)美国俄勒冈州立大学毕业证双学位证书原版一模一样
哪里买(osu毕业证书)美国俄勒冈州立大学毕业证双学位证书原版一模一样哪里买(osu毕业证书)美国俄勒冈州立大学毕业证双学位证书原版一模一样
哪里买(osu毕业证书)美国俄勒冈州立大学毕业证双学位证书原版一模一样
 
The Enigmatic Portrait, In the heart of a sleepy town
The Enigmatic Portrait, In the heart of a sleepy townThe Enigmatic Portrait, In the heart of a sleepy town
The Enigmatic Portrait, In the heart of a sleepy town
 
Snoopy boards the big bow wow musical __
Snoopy boards the big bow wow musical __Snoopy boards the big bow wow musical __
Snoopy boards the big bow wow musical __
 
高仿(nyu毕业证书)美国纽约大学毕业证文凭毕业证原版一模一样
高仿(nyu毕业证书)美国纽约大学毕业证文凭毕业证原版一模一样高仿(nyu毕业证书)美国纽约大学毕业证文凭毕业证原版一模一样
高仿(nyu毕业证书)美国纽约大学毕业证文凭毕业证原版一模一样
 
From Teacher to OnlyFans: Brianna Coppage's Story at 28
From Teacher to OnlyFans: Brianna Coppage's Story at 28From Teacher to OnlyFans: Brianna Coppage's Story at 28
From Teacher to OnlyFans: Brianna Coppage's Story at 28
 
Leonardo DiCaprio House: A Journey Through His Extravagant Real Estate Portfolio
Leonardo DiCaprio House: A Journey Through His Extravagant Real Estate PortfolioLeonardo DiCaprio House: A Journey Through His Extravagant Real Estate Portfolio
Leonardo DiCaprio House: A Journey Through His Extravagant Real Estate Portfolio
 
The Evolution of the Leonardo DiCaprio Haircut: A Journey Through Style and C...
The Evolution of the Leonardo DiCaprio Haircut: A Journey Through Style and C...The Evolution of the Leonardo DiCaprio Haircut: A Journey Through Style and C...
The Evolution of the Leonardo DiCaprio Haircut: A Journey Through Style and C...
 
Authenticity in Motion Pictures: How Steve Greisen Retains Real Stories
Authenticity in Motion Pictures: How Steve Greisen Retains Real StoriesAuthenticity in Motion Pictures: How Steve Greisen Retains Real Stories
Authenticity in Motion Pictures: How Steve Greisen Retains Real Stories
 
Orpah Winfrey Dwayne Johnson: Titans of Influence and Inspiration
Orpah Winfrey Dwayne Johnson: Titans of Influence and InspirationOrpah Winfrey Dwayne Johnson: Titans of Influence and Inspiration
Orpah Winfrey Dwayne Johnson: Titans of Influence and Inspiration
 
Christian Louboutin: Innovating with Red Soles
Christian Louboutin: Innovating with Red SolesChristian Louboutin: Innovating with Red Soles
Christian Louboutin: Innovating with Red Soles
 
DIGIDEVTV A New area of OTT Distribution
DIGIDEVTV  A New area of OTT DistributionDIGIDEVTV  A New area of OTT Distribution
DIGIDEVTV A New area of OTT Distribution
 
The Unbelievable Tale of Dwayne Johnson Kidnapping: A Riveting Saga
The Unbelievable Tale of Dwayne Johnson Kidnapping: A Riveting SagaThe Unbelievable Tale of Dwayne Johnson Kidnapping: A Riveting Saga
The Unbelievable Tale of Dwayne Johnson Kidnapping: A Riveting Saga
 
定制(uow毕业证书)卧龙岗大学毕业证文凭学位证书原版一模一样
定制(uow毕业证书)卧龙岗大学毕业证文凭学位证书原版一模一样定制(uow毕业证书)卧龙岗大学毕业证文凭学位证书原版一模一样
定制(uow毕业证书)卧龙岗大学毕业证文凭学位证书原版一模一样
 

2.1

  • 1. CHAPTER 2: FUNCTIONS, EQUATIONS, AND GRAPHS 2.1 Relations and Graphs
  • 2. RELATIONS  A relation is a set of pairs of input and output values.  There are four ways to represent relations
  • 3. EXAMPLE: REPRESENTING RELATIONS  The monthly average water temperature of the Gulf of Mexico in Key West, Florida varies during the year. In January, the average water temperature is 69°F, in February, 70°F, in March, 75°F and in April, 78°F. What is one way to represent this relation?
  • 4. DEFINITIONS  The domain of a relation is the set of inputs, also called the x-coordinates, of the ordered pairs.  The range is the set of outputs, also called the y- coordinates, of the ordered pairs.
  • 5. EXAMPLE: FIND THE DOMAIN AND RANGE OF EACH.
  • 6. FUNCTIONS  A function is a relation in which each element of the domain corresponds to exactly one element of the range.  When using a mapping diagram to represent a relation, a function has only one arrow from each element of the domain.  Example:
  • 7. EXAMPLE: IS THE RELATION A FUNCTION?
  • 8. THE VERTICAL LINE TEST  The vertical line test is used to test whether a graph represents a function.  The vertical line test states that if any vertical line passes through more than one point on the graph of a relation, then the relation is not a function.
  • 9. EXAMPLE: USE THE VERTICAL LINE TEST. WHICH GRAPH(S) REPRESENTS A FUNCTION?
  • 10. FUNCTIONS  A function rule is an equation that represents an output value in terms of an input value.  We write a function rule in function notation.
  • 11. EXAMPLE: USING FUNCTION NOTATION  For f ( x ) = −2 x, + 5 what is the output for 1 the inputs: −3,0,& 4
  • 12. EXAMPLE: USING FUNCTION NOTATION  For f ( x ) = −4 x + 1 ,what is the output for the inputs: −2,0,5
  • 13. EXAMPLE:  Tickets to a concert are available online for $35 each plus a handling fee of $2.50. The total cost is a function of the number of tickets bought. What function rule models the cost of the concert tickets? Evaluate the function for 4 tickets.
  • 14. EXAMPLE  You are buying bottles of a sports drink for a softball team. Each bottle costs $1.19. What function rule models the cost of a purchase. Evaluate the function for 15 bottles.

Editor's Notes

  1. January = 1 February = 2
  2. Can Skip depending on Time
  3. C(t)=35t+2.50