WEDNESDAY MATH 8 SET#1: Functions and Slope (8th CCSS)

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2. Ariel is emptying the water from a 10 gallon cooler. The graph shows the water level in the cooler as she empties it. Which best describes the rate of change shown in the graph?

• F. The water level decreases 10 gallons per second.
• G. The water level decreases 1 gallon every 2 seconds.
• H. The water level decreases 3 gallons every 2 seconds.
• J. The water level decreases 2 gallons every 3 seconds.

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4. Which of the following situations does not have the same unit rate as the graph shown?

• F. Asher buys gum for $0.20 a piece.
• G. A daycare has six workers for every 30 children.
• H. Melanie reads 9 pages of her book every 45 minutes.
• J. Richie earns $10 every 2 hours to pet sit for his neighbor.

5. Which of the following is true about the graph shown below?

• A. The graph is not a function because it does not start at (0, 0).
• B. The graph is a function because it passes the vertical line test.
• C. It is not a function because it is not linear.
• D. It is a function because it has a constant rate of change.

6. The graph below shows the distance of three runners compared to the time during a race. Which of the following is not a true statement based on the graph?

• F. Runner B gradually increased his speed.
• G. Runner A started in 2nd place and finished 1st.
• H. Runner C ran the furthest distance.
• J. Runner C gradually decreased his speed.

7. Which is true about triangles ABC and DEF?

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9. The graph below represents Randy’s drive to school. Which of the following is a correct conclusion based on the graph?

• A. Randy stopped twice on the way to school.
• B. Randy drove uphill most of the drive.
• C. Randy increased his speed the entire drive.
• D. Randy did not make any stops on the way to school.

10. The graph shows the amount in Harold’s savings account over a certain number of weeks. Find the rate of change.