Question

Water coming out from a fountain is modeled by the function f(x)= -x^2+8x+2 where f(x) represents the height, in feet, of the water from the fountain at different times x, in seconds

What does the average rate of change of f(x) from x=1 to x=4 represent?

A. The water travels an average distance of 3 feet from 1 second to 4 seconds
B. The water travels an average distance of 2 feet from 1 second to 4 seconds
C. The water rises up with an average speed of 3 feet per second from 1 second to 4 seconds
D. The water rises up with an average speed of 2 feet per second from 1 second to 4

Answer 1

Just need some help! thanks

Answer 2

It would be D

Answer 3

thanks so much @DontThankMeBrainMe