Functions Relations

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

Is this table a function or not a function? 

• Function

• Not a Function

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)

.

• Function

• Not a Function

.

• Function

• Not a Function

Is the relation a function?

{(-6,4), (5,-1), (0,3), (-2, 4)}

• yes

• no

• maybe

Is the relation shown here a function?

• yes

• no

• maybe

Which of the following equations is written in FUNCTION NOTATION?

• y = x - 7

• x = 8y + 9

• f(x) = 24x

• f = 2x + 9y

The graph pictured here is NOT A FUNCTION. Why?

• because it isn't a straight line

• because the coordinates, or points, are missing

• because it doesn't pass the vertical line test

• because there is no equation describing the graph

Find f(106):

• x = 3

• y = 3

• y = 36

• x = 53