STAAR Algebra Review

What does the slope mean in this situation?

• 2 gallons of water leaves per minute

• 2 gallons of water leaves every 2 minutes

• 1 gallon of water leaves every 2 minutes

• 2 gallons of water comes into the tank per minute

Dev keeps a record in graph form of how far his car travels and the number of gallons of gasoline it uses.

What is the slope of the graph?

• 64

• 32

• 128

• 16

A climber is on a hike. After 2 hours he is at an altitude of 400 feet. After 6 hours, he is at an altitude of 700 feet. What is the average rate of change?

• 200 ft/hr

• 300 ft/hr

• 150 ft/hr

• 75 ft/hr

What is the slope of a line that passes through the points (2, 6) and (2, -11)?

• 17

• 0

• 1

• Undefined

What is the slope of a line that passes through the points (3, 10) and (0, 10)?

• 3

• 10

• 0

• Undefined

What is the slope of the line that passes through the point of (4, 12) and (-2, -6)?

• 3

• -3

• 1/3

• • 1/3

The graph models the linear relationship between the temperature of Earth’s atmosphere and the altitude above sea level. Which of these best represents the rate of change of the temperature with respect to altitude?

• -6.5 degrees/km

• -3.5 degrees/km

• -0.29 degrees/km

• -0.15 degrees/km

What is the equation of the line that passes through the point (-2, 7) and has a slope of zero?

• x = -2

• x = 7

• y = -2

• y = 7

The function y = 3.75 + 1.5(x - 1) can be used to determine the cost in dollars for a taxi ride of x miles. What is the rate of change of the cost in dollars with respect to the number of miles?

• $1.50 per mile

• $3.75 per mile

• $4.25 per mile

• $5.25 per mile