Function Identification Algebra

What always goes inside the parentheses in "f(x)"?

• the output

• the input

• the y-value

• the answer

Evaluate g(5) when g(x)=2x

• g(5) = 2

• g(5) = 5

• g(5) = 7

• g(5) = 10

Evaluate f(10) when f(x)=2x+1

• f(10) = 3

• f(10) = 10

• f(10) = 21

• f(10) = 30

Is this a function?

• Yes, one output for each input

• No, multiple y-values for an x-value

• It depends

• Not enough information

Is the Mapping Diagram

A Function or Not A Function

• Function

• Not A Function

Is the Mapping Diagram

A Function or Not A Function

• Function

• Not A Function

Is the Mapping Diagram

A Function or Not A Function

• Function

• Not A Function

Is the Mapping Diagram

A Function or Not A Function

• Function

• Not A Function

Is the Mapping Diagram

A Function or Not A Function

• Function

• Not A Function

Is the Mapping Diagram

• Function

• Not A Function