Math STAAR Slope and Rate of Change Review

The table shows the number of gallons of gasoline in a car’s gas tank after the car has been driven x miles.

When these data are graphed on a coordinate grid, the points all lie on the same line. What are the slope and y-intercept of this line?

• Slope = 25, y-intercept = 375

• Slope = −25, y-intercept = 15

• Slope = −1/25, y-intercept = 15

• Slope = 1/25, y-intercept = 375

• Function
• Not a Function

What is the slope?

• -1/3

• -3

• -4

• 5

Find the rate of change.

• -2 minutes per gallon

• -20 minutes per gallon

• -2 gallons per minute

• -20 gallons per minute

Find the slope of the line.

• 1/2

• -1/2

• 2

• -2

• F

• G

• H

• J

• A

• B

• C

• D

• 1/5

• -5

• 5

• -1/5

Slope is ________.

• Positive

• Negative

• Zero

• Undefined

Find the slope of the line.

• -2

• 2

• -1/2

• 1/2