Functions Test #2

What is the definition of a function?

• Has inputs and outputs
• Every input has only ONE output
• Inputs have different outputs every time
• x-values and y-values

Is this a function?

• Yes

• No

• Maybe

• Could be

Is this graph a function or not a function? 

• Function
• Not a Function

Slope is describe as

•  $\frac{rise}{run}$  

•  $\frac{run}{rise}$  

Which equation is being represented by this line?

• y = -1x + 2

• y = 1/2x + 2

Which statement is true about the relation {(-2, 4), (4, 2), (2, 4), -4, 2)}?

• The relation is NOT a function because all the y-values are not different.
• The relation is NOT a function because all the x-values are not different.
• The relation is a function because the y-values are different.
• The relation is a function because all the x-values are different.

Which of the following table of values represent a function?

• 
• 
• 
• 

Calculate the rate of change.

• 6
• 1/6
• -6
• -1/6

What is the rate of change for the following graph?

• 80
• 20
• 40
• 160

Which statement describes the rate of change of the line?

• $20 each week

• $30 each week

• $25 each week

• $70 each week