Question

An airplane ascends at the rate of 40 feet per minute. The function below shows the height of the airplane from the ground f(t) after t minutes:

f(t) = 40t + 520

Which statement best describes the y-intercept of the graph of the function?

Answer 1

A) It is equal to 520 and represents the height of the airplane above the ground, in feet, after 1 minute.

B) It is equal to 560 and represents the height of the airplane above the ground, in feet, after 1 minute.

C) It is equal to 40 and represents the height of the airplane above the ground, in feet, before it starts ascending.

D) It is equal to 520 and represents the height of the airplane above the ground, in feet, before it starts ascending.

Answer 2

I don't think it's B or C.

Answer 3

good

Answer 4

remember, y intercept is the starting value. you get y intercept by plugging in t = 0

Answer 5

So would it be D? Since that's the initial height?

Answer 6

Yep !

Answer 7

Thanks hun :) I appreciate the help a lot!

Answer 8

yw!