Which of these is a polynomial? BRAINLIEST for correct

What is the effect on the graph of the parent function f(x) = x when f(x) is replaced with 3f(x)? a) shifts the line 3 units up b) shifts the line 3 units down c) increases the slope of the line by a factor of 3 d) decreases the slope of the line by a factor of 3

Me. i can't figure out this question. give an explanation too. .

East black horse $0.25 total budget is $555 it'll cost $115 for other supplies about how many flyers do you think we can buy