MCAS 1999, 8th Grade Math, Questions 13-16

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Question #13

Use the graph to answer question 13.

Which of the following could be shown by the graph?

A. the height of a candle as it burns over time

B. the height of a ball thrown straight upward over time

C. the distance covered by a car tranveling at a constant speed over time

D. the height of water in a tank being drained at a constant rate over time

Which of the following best describes the meaning of π?

A. the measurement of the circumference of a circle

B. the measurement of the diameter of a circle

C. the ratio of the circumference of a circle to its diameter

D. the ratio of the area of a circle to its circumference

Luis is going to toss two coins. What is the probability that he will toss one head and one tail?

A. 1/4

B. 1/3

C. 1/2

D. 3/4

The following equation shows the relationship between a distance traveled (d), the time traveled (t), and the rate (r):

If the time t increases and the distance d remains the same, what happens to the rate r?

A. It increases.

B. It decreases.

C. It remains the same.

D. There is not enough information given to tell.