F (x) = 4x ⇒ y = 4x
↓
x = 4y Divide by 4 on both sides
↓
x / 4 = y ⇒ Inverse function = x / 4
I don't know how to explain but the answer is 2.4.
-5 because a negative plus a negative is a positive this is why it is the right answer
Here's the solution ~
Therefore, the correct choice is A
