See the comment above.
Interchange the x and y in the original equation. call f(x) = y just for ease of understanding.
y = 3x + 5
Inverse
x = 3y + 5 Now solve for y.
(x - 5) = 3y Divide by 3
(x - 5)/3 = y
Remove the brackets.
x /3 - 5/3 = y
The answer is D <<<<< answer.
