The y- axis goes up and down.
and......
The x- axis goes from left right.
First make x the subject:-
3x = F(x) + 4
x = (F(x) + 4) / 3
f(-1(x) = (x + 4) / 3 answer
Answer:135
Step-by-step explanation:
bcs 45x60 is 2700 ÷20= 135
Answer: 
Step-by-step explanation:
ANSWER
My answer is in the photo above