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Bell Work                                                Write the answers in your composition
                                                         book, labeling the top of the page with the
Jan. 9, 2012                                             date.

1. How many solutions are there for                  ?

2. Fill in the green boxes in the following table:
Relation
Brainstorm
A relation is a set of related information

                             Example:
       A list of names of people in our class and their heights


Name                               Height
A relation could also look like this:
A relation could also look like this:




Because the relation has           two types of information,
        we can graph it            on a coordinate plane.
If all relations that exist were represented by this pentagon...



                        RELATIONS
If all relations that exist were represented by this pentagon...



                        RELATIONS



                        FUNCTIONS

               ...then this circle represents all
                the possible functions. Every
                     function is a relation.
Functions are "well-behaved" relations. To be a function, a relation has to follow
                                   one rule:

               Each x-value must relate to 1 and only 1 y-value.




           FUNCTION                                       NOT A FUNCTION

x             y                                      x               y

1             2                                      1               2
2             3                                      2               3
3             3                                      2               4

4             5                                      4               5
Quick Poll:
Is this relation a
    function?
Quick Poll:
Is this relation a
    function?
In dating relationships, what is one thing that someone could do that would lead
                      most people to break up immediately?
Picture a world where in dating relationships, guys can only
                date one girl, but girls can date as many guys as they want.

                A Function is like this.
                ·Guys are x-values
                ·Girls are y-values
                ·Domain: all x-values, or guys, in a relation
                ·Range: all y-values, or girls, in a relation

                As a class, we are going to create a set of functional
                relationships according to this rule.


Functional
Relationships
Functional
Relationships

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1.9.12 functions/relations

  • 1. Bell Work Write the answers in your composition book, labeling the top of the page with the Jan. 9, 2012 date. 1. How many solutions are there for ? 2. Fill in the green boxes in the following table:
  • 3. A relation is a set of related information Example: A list of names of people in our class and their heights Name Height
  • 4. A relation could also look like this:
  • 5. A relation could also look like this: Because the relation has two types of information, we can graph it on a coordinate plane.
  • 6. If all relations that exist were represented by this pentagon... RELATIONS
  • 7. If all relations that exist were represented by this pentagon... RELATIONS FUNCTIONS ...then this circle represents all the possible functions. Every function is a relation.
  • 8. Functions are "well-behaved" relations. To be a function, a relation has to follow one rule: Each x-value must relate to 1 and only 1 y-value. FUNCTION NOT A FUNCTION x y x y 1 2 1 2 2 3 2 3 3 3 2 4 4 5 4 5
  • 9. Quick Poll: Is this relation a function?
  • 10. Quick Poll: Is this relation a function?
  • 11. In dating relationships, what is one thing that someone could do that would lead most people to break up immediately?
  • 12. Picture a world where in dating relationships, guys can only date one girl, but girls can date as many guys as they want. A Function is like this. ·Guys are x-values ·Girls are y-values ·Domain: all x-values, or guys, in a relation ·Range: all y-values, or girls, in a relation As a class, we are going to create a set of functional relationships according to this rule. Functional Relationships