Evaluating and Identifying Functions

Identify the range of the relationship.

Identify the domain of the relationship.

Is this a function or not a function

• Function

• Not a function

What is the main characteristic of a function?

• Every input can have more than one output

• Inputs have different outputs every time

• Every input has only ONE output

• Inputs are dependent variables.

Is this a function or not a function

• Function

• Not a function

Find f(-2), if f(x) = 2x - 5

• f(-2) = -1

• f(-2) = -9

• f(-2) = 9

• f(-2) = 0

g(x) = 5 - 6x Find g(-5)

• g(-5) = -25

• g(-5) = 6

• g(-5) = 4

• g(-5) = 35

What does the x represent in a function?

• Output ; independent variable

• Input; dependent variable

• Output; dependent variable

• Input; independent variable

What does the y represent in a function?

• Input; independent variable

• Output; dependent variable

• Input; dependent variable

• Output; independent variable

Does this mapping diagram represent a function?

• No, because an input value goes to multiple output values

• Yes, because each input goes to one and only one output