Question

If f(x) = 5x − 3, which expression represents its inverse function?

A.


B.
`(x + 3)/(5)`

C.
`(5)/(x + 3)`

D.
`(x − 3)/(2)`

Answer 1

B.

`(x+3)/(5)`

Explanation:

5x - 3 = y then 5x = y + 3 then x = (y + 3)/5

then the inverse function of f is : (x+3)/5