Function Review

What is the definition of function?

• Has inputs and outputs

• Every input has only ONE output

• Inputs have different outputs every time

• x-values and y-values

Which set of values is a function?

• (9,5) (10,5) (9,-5) (10,-5)

• (3,4) (4,-3) (7,4) (3, 8)

• (6,-5) (7, -3) (8, -1) (9, 1)

• (2, -2) (5, 9) (5, -7) (1, 4)

Is the graph pictured a function?

• Yes

• No

Is the graph pictured a function?

• Yes

• No

Evaluate f(-4) for the function f(x)=3x²-5

• f(-4) = 43

• f(-4) = 139

• f(-4) = -52

• f(-4) = -149

Determine whether the relation shown here is a function. Explain your answer.

• function, an input has 1 output

• function, an input has 2 different outputs

• function, no output has 2 different inputs

• not a function, an input has 2 different outputs

Is the function linear or nonlinear?
y = x² + 7

• Linear

• Nonlinear

Is this function linear or nonlinear?

• Linear

• Nonlinear

Is this  graph a function?

• Function

• Not a Function

Is the equation linear or nonlinear?

• Linear

• Nonlinear