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14 September, 03:07

Find the rate of change for the situation. You run 7 miles in one hour and 21 miles in three hours.

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  1. 14 September, 03:15
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    By definition,

    Speed = the rate of change of Distance over Time

    When Distance = 7 miles and Time = 1 hour, the speed is

    7/1 = 7 mph (miles per hour)

    When Distance = 21 miles and Time = 3 hours, the speed is

    21/3 = 7 mph

    Answer: 7 mph (miles per hour)
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