A bicyclist rides the same number of miles every minute. The ratio table below shows the number of miles she rides during certain amounts of time. Biking Times and DistancesNumber of MinutesNumber of Miles102.5164?7.54812Which statement explains how to find the number of minutes it takes to bike 7.5 miles?
Answer
A
Find the ratio of minutes to miles, 4:1. Divide 7.5 by 4.
B
Find the ratio of minutes to miles, 4:1. Multiply 7.5 by 4.
C
Find the difference between 16 and 10. Add the difference to 16.
D
Find the difference between 16 and 10. Add the difference to 7.5.
Explanation
The bicyclist rides 2.5 miles in 10 minutes, so the time-to-distance ratio is 10 ÷ 2.5 = 4 minutes per mile. To find the time for 7.5 miles, multiply 7.5 by 4, giving 30 minutes. This matches the statement to multiply 7.5 by 4.
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