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

the y intercept is what you get when \(t=0\) i.e. when you start counting, if \(t\) is time i

Answer 2

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

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

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

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

Answer 3

so the last one is right then

Answer 4

@jigglypuff314

Answer 5

You can treat this function as the linear equation and make this function to
y=40x+520
Like what @satellite73 said, just plug in 0 for x to find y :)

Answer 6

correct @Teamus1021 ^_^