Aplane is thrown. after 2 seconds is has gone 15 feet. after 7 seconds it has gone 55 feet. find average rate of change of the plane.

average rate of change of the plane = average speed =

Step-by-step explanation:

we know that

average rate of change of the plane = average speed of the plane

average speed = (change in distance)/(change in time)

since th goes from 15 feet to 55 feet from 2 seconds to 7 seconds

change in time = final time - initial time = 7-2 = 5 seconds.

change in distance = final distance - initial distance

                                = 55-15 = 40 feet.

therefore average speed =

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