Unit 3A Test Review

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What is the slope of the line that passes through the points (-3,9) and (9,18)

• 3/4

• -3/4

• 4/3

• -4/3

The table shows the total cost of different amounts of granola. What is the rate of change of the total cost in dollars with respect to the number of ounces of granola for this linear relationship?

The graph of part of linear function h is shown on the grid. Which inequality best represents the domain of the part shown?

The graph of a linear function is shown on the grid. What is the rate of change of y with respect to x for this function?

The table shows the linear relationship between the playing time in minutes of high definition and the file size of these videos in megabytes. What is the rate of change of the playing time per megabyte?

A balloon filled with water was thrown from the top of Hirschi High School. The height of the balloon above the ground can be found using the function y = -2.25x + 180. How many seconds did it take the balloon to reach the ground?

The graph models the linear relationship between the number of laps remaining and the number of minutes a person has run. Which statement describes the x-intercept of the graph?

• The x-intercept is 10, which represents the initial number of laps remaining.

• The x-intercept is 30, which represents the initial number of laps remaining.

• The x-intercept is 10, which represents the number of minutes it takes to finish the race.

• The x-intercept is 30, which represents the number of minutes it takes to finish the race.

A scuba diver is diving in the Atlantic Ocean. The table shows the linear relationship between the depth of the scuba diver and the number of seconds the diver is in the water. What is the rate of change of depth in the water to the number of seconds?

• 6 meters per second

• 1/2 meters per second

• 2 meters per second

• 1/6 meters per second

The distance a car is from St. Louis is changing at a constant rate. The graph shows the linear relationship between time in hours, x, and the distance from St. Louis in miles, y. Complete the statement that describes the rate of change of the distance from St. Louis with respect to time. Use the following to fill in the blanks (decreases, increases, 360, 60, 6) . Not all answers will be used. Type the entire statement in the answer. "The distance _______ at a rate of ________ miles per hour."