Question

Water coming out from a fountain is modeled by the function f(x) = −x2 + 5x + 4 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 = 3 to x = 5 represent?

Answer 1

The water falls down with an average speed of 3 feet per second from 3 seconds to 5 seconds.
The water falls down with an average speed of 5 feet per second from 3 seconds to 5 seconds.
The water travels an average distance of 3 feet from 3 seconds to 5 seconds.
The water travels an average distance of 5 feet from 3 seconds to 5 seconds.

Answer 2

@campbell_st plzz

Answer 3

@welshfella anything

Answer 4

please bro

Answer 5

plug in x = 3 and x = 5 into the equation to see the height of the water at these times
f)3) = -(3)^2 + 5(3) + 4 = -9+15+4 = 10 feet

can you work out the height for x = 5?

Answer 6

just plug in x=5 and work it out as above

Answer 7

im confused

Answer 8

what exactly do i have to solve

Answer 9

do as I have done but replace the 3 by 5
f(5) = -(5)^2 etc

Answer 10

ughh