If it is right i will mark it a ball is thrown upward from the top of a building. the function below shows the height of the ball in relation to sea level, f(t), in feet, at different times, t, in seconds: f(t) = −16t2 + 48t + 160 the average rate of change of f(t) from t = 3 seconds to t = 5 seconds is feet per second.