Atoy rocket launched straight up from the ground with an initial velocity of 80 ft/s returns to the ground after 5 s.
the height of the rocket t seconds after launch is modeled by the function f(t)=-16t^2+80t.
what is the maximum height of the rocket, in feet?

1.4

2.3

step-by-step explanation:

the formula for the constant of variation is

y= kx

divide each side by x

y/x =kx/x

y/x =k

we know a and y

1.   y/x = k

4/1 =4

check the other values to make sure they are the same

8/2 = 4   12/3 =4   and 16/4 =4  

the constant of variation is 4

2.   y/x = k

3/1 =3

check the other values to make sure they are the same

6/2 = 3   9/3 =3   and 12/4 =3  

the constant of variation is 3

597

step-by-step explanation:

step-by-step explanation:

step-by-step explanation: