Question

2) What is the inverse of the function y = 4x +5?

Answer 1

`f^(-1)(x)=(1)/(4) x-(5)/(4)`

Explanation:

make
`x` the subject:

`y=4x+5`

⇒
`4x=y-5`

⇒
`x=(1)/(4) y-(5)/(4)`

change y to x:

`f^(-1)(x)=(1)/(4) x-(5)/(4)`