Answer:
I believe it is right by looking at this picture, but I am not certain
First make x the subject:-
3x = F(x) + 4
x = (F(x) + 4) / 3
f(-1(x) = (x + 4) / 3 answer
A bar graph since I'm only going up by fives it's easy to show as a bar graph
Its very easy
455 means 5*7*13
now divide (5*7*13) by 7
you will easily get 5*13=65