2 - Functions and Slope (8th TEKS)

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1. The table below shows Vanessa’s height in inches for two different years. Which is a correct conclusion about the rate of change shown in the table?

• A. Vanessa grows about 41.7 inches per year.
• B. Vanessa grows about 6 inches per year.
• C. Vanessa grows about 1.2 inches per year.
• D. Vanessa grows about .83 inches per year.

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 following set of ordered pairs represents y as a function of x. Which of the following could be the missing ordered pair?

• F. (9, -8)
• G. (-3, 9)
• H. (-9, 8)
• J. (6, -2)

7. Which is true about triangles ABC and DEF?

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8. Which of the following representations shows y as a function of x?

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