Kennard decides to go parachuting. At the time 0 seconds, he opens his parachute at a height of 2500 feet above the ground. At 35 seconds, his height is 2115 feet. What is Kennard's rate of change
(final height - initial height) / time
= (2115 -2500) / 35 = - 385/35 = -11 meters/second