William raced up a flight of stairs at the rate of 3 stairs per second. The function below shows the total number of stairs f(t) that he is able to climb in t seconds.

f(t) = 3t + 4

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

It is equal to 7 and represents the number of stairs William can climb in 1 second.

It is equal to 3 and represents the number of stairs William can climb in 1 second.

It is equal to 4 and represents the number of stairs William had already climbed before he started racing up.

Question

William raced up a flight of stairs at the rate of 3 stairs per second. The function below shows the total number of stairs f(t) that he is able to climb in t seconds.

f(t) = 3t + 4

Which statement best describes the y intercept of the graph of the function? 

It is equal to 7 and represents the number of stairs William can climb in 1 second. 

 It is equal to 3 and represents the number of stairs William can climb in 1 second. 

 It is equal to 4 and represents the number of stairs William had already climbed before he started racing up.

anonymous · Answer

I forgot choose D which is 

It is equal to 3 and represents the number of stairs William had already climbed before he started racing up.

mathmale · Answer

"3 stairs per second" is a "rate of change" and is the slope of the graph of f(t) = 3t + 4.  Try again.

anonymous · Answer

am so confused

anonymous · Answer

hi