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?

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?

satellite73 · Answer

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

teamus1021 · Answer

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.

teamus1021 · Answer

so the last one is right then

teamus1021 · Answer

@jigglypuff314

seratul · Answer

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 :)

jigglypuff314 · Answer

correct @Teamus1021 ^_^