Math 8: Unit 8 End of Unit Review

The scatter plot shows the scores of a group of 8th graders on a recent science test and the average time, in minutes, they spent studying science every day. Which statement best describes the association between the science scores and the time spent studying science?

• A. There is a linear and negative association.

• B. There is a linear and positive association.

• C. There is a nonlinear and negative association.

• D. There is a nonlinear and positive association.

Which scatter plot shows a negative linear association between the two variables?

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8.SP.A.1

Teachers buy pencils for their classrooms. The scatter plot shows the total cost based on the number of pencils purchased. Which statement is true?

• The scatter plot represents a linear, negative relationship between the variables.

• The scatter plot represents a linear, positive relationship between the variables.

• The scatter plot represents a nonlinear, negative relationship between the variables.

• The scatter plot represents a nonlinear, positive relationship between the variables.

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8.SP.A.1

The relationship between the numbers of cars in a company’s parking lot versus time for the morning shift is shown in the scatter plot.

Which linear model best fits the data shown in the scatter plot?

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8.SP.A.2

Which scatter plot has the most accurate line-of-best fit?

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8.SP.A.2

Consider the scatter plot, which shows the relationship between the average temperature and the number of pairs of ice skates sold per week from a sporting goods store. Which line best models the data?

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8.SP.A.2

The graph displays the approximate percentages of U.S. households with pets from 2012 to 2017 Let 2012 be year 0.

Which linear equation best models this relationship?

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8.SP.A.3

• A. Every 0.2 day the bean plant grows an average of 1 inch per day.

• B. Every 0.4 day the bean plant grows an average of 1 inch per day.

• C. Every day the bean plant grows an average of 0.2 inch per day.

• D. Every day the bean plant grows an average of 0.4 inch per day.

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8.SP.A.3

• the volume, in liters, of water in the pool after t seconds

• the initial volume, in liters, of water in the pool

• the increase in volume, in liters, of water in the pool every second.

• the total increase in volume, in liters, of the pool

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8.SP.A.3

The table shows the different choices for making a stuffed animal at a toy store. Maya and Kyle will randomly select one animal type, one shirt color, and one pants color.

What is the probability that Maya will make a stuffed animal that is a dog wearing a green shirt and white pants?

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8.SP.B.4a