Please help ! Algebra

Answer:
C
Step-by-step explanation:
y = (2x - 2) / 4 Interchange x and y
x = (2y - 2) / 4 Multiply both sides by 4
4x = 2y - 2 Add 2 to both sides.
4x + 2 = 2y Divide both sides by 2
4x/2 + 2/2 = 2y / 2
2x + 1 = y
Now put 3 in wherever you see an x
2*3 + 1 = y
6 + 1 = y
7 = y
Answer:
f^-1(3) =7
Step-by-step explanation:
no calculate f^-1 :
let : f^-1(3) =a so : f(a) = 3
(2a-2)/4 = 3
2a-2 = 12
2a=14
a = 7
f^-1(3) =7