Functions and Function Tables

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 this graph a function or not a function? 

• Function 

• Not a Function 

Which ordered pair could you add to the following list of points to create a function?  (3, 5) (4, 9) (2, 5) 

• (3, 7)

• (4, 1) 

• (1, 9)

• (2, 6)

This graph represents which function?

• y = -2x

• y = 2x

• y = -2x + 1

• y = 2x - 1

The table shows the amount of money Anisha is paid for working different numbers of hours.  What would be Anisha's total pay if she works for 24 hours in a week?

• $170

• $168

• $175

• $180

Is this table a function or not a function? 

• Function

• Not a Function

Find the rate of change

• 1

• 2

• 11

• Not a constant slope/Non-Linear

Does this table represent a function?

• Yes

• No

f(x)=4x+5
f(4)=

• 21

• -11

• -31

• 25