Question

A plane 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.

Answer 1

average rate of change of the plane = average speed =
`(40)/(5) =8(feet)/(s)`

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 =
`(40)/(5) =8(feet)/(s)`