Answer:
-10 feet per second
Explanation:
You want to get the change in height per second. In order to change the 6 to a 1, you have to divide each side by 6.
60 ÷ 6 = 10
6 ÷ 6 = 1
As long as the rate she is falling is constant, she will fall at 10 feet per second until she slows down with her parachute or hits the ground.