Unit 3 Practice Test

Which two tables are LINEAR?

• 
• 
• 
• 

Which equations represent a straight line?

Select the functions that are nonlinear

• {(0, 1), (2, 4), (4, 7)}

• 
• 

The table represents a linear function. Which equation represents the function defined by this table of values?

• y = -2x - 4

• y = -x + 3

• y = -2x + 3

• y = -2x - 3

Laura is working to buy a new backpack. She needs to earn $80. She saves $5 each day toward the cost of the purse. The equation for the amount she has left to save is y = 80 - 5x , where x is the number of
days she has to work.

What is the slope

• 80

• -5

• -80

• 5

• 85

Laura is working to buy a new backpack. She needs to earn $80. She saves $5 each day toward the cost of the purse. The equation for the amount she has left to save is y = 80 - 5x , where x is the number of
days she has to work.

What is the y-intercept?

• 80

• -5

• -80

• 5

• 85

Laura is working to buy a new backpack. She needs to earn $80. She saves $5 each day toward the cost of the purse. The equation for the amount she has left to save is y = 80 - 5x , where x is the number of
days she has to work.

The _____ shows the amount she needs to save

• slope

• y-intercept

• -80

• 5

• 85

Laura is working to buy a new backpack. She needs to earn $80. She saves $5 each day toward the cost of the purse. The equation for the amount she has left to save is y = 80 - 5x , where x is the number of
days she has to work.

The _____ shows she is saving ____ per day

• slope, -5

• y-intercept, 80

• slope, 5

• y-intercept, 5

Which graph shows a zero rate of change?

• A

• B

• C

• D

Which best describes interval 3

• linear, increasing

• linear, decreasing

• nonlinear, increasing

• nonlinear, decreasing