class slides

1. Housekeeping
Yesterday, we discussed the difference
between a relation and a function.
Today we will continue identifying functions

2. Goal….
* Determine
if a set of
points
determine a
function
Agenda….
 Review definition of a
function
 Determine if a set of
points represent a
function

3. Do you learn better by
looking at visuals rather than
reading a definition?

5. In this lesson you will learn how
to tell if a set of points
represents a function by looking
at points plotted on a graph.

6. Let’s Review
A function is a relation in
which a rule assigns every
input a unique output.
If I tell you the
input, can you
predict the output?

7. Let’s Review
App Price
1 $2.00
2 $4.00
3 $6.00
4 $8.00
(1, 2)
(2, 4)
(3, 6)
(4, 8)
Number of Apps
TotalPrice
1 2 3 4 5 6
2
4
6
8
10
12
Input Output
yx
y
x
(x, y)

8. Core Lesson
Name of Swimmer
Pat Jess Lee Adri
0.5
1.0
1.5
2
2.5
3
y
x
SwimTime
Swimmer Time (min)
Pat 2.5
Jess 2
Lee 3
Adri 2
Input Output
Predictable Penguins

9. A Common Misunderstanding
Name of Swimmer
Pat Jess Lee Adri
0.5
1.0
1.5
2
2.5
3
y
x
SwimTime

10. Core Lesson
Name of Swimmer
Stu Sam Sal Steve
0.5
1.0
1.5
2
2.5
3
y
x
SwimTime
Shifty Squids

11. Core Lesson
1 2 3 4 5
y
x
1 2 3 4 5
20
40
60
80
100
y
x
Hours Studied
TestScore
40
60
80
100
20
Number Wrong
TestScore

12. Core Lesson
1 2 3 4 5 6
1
2
3
4
5
6
y
x

13. Core Lesson
1 2 3 4 5 6
1
2
3
4
5
6
y
x

14. In this lesson you have learned
how to tell if a set of points
represents a function by looking
at points plotted on a graph.

15. Goal….
* Determine
if a set of
points
determine a
function
Practice:
IXL Skill X.1