Question

Find the inverse function of f(x)=4x-8

Answer 1

f^-1(x)=1/4x+2

Explanation:

y=4x-8

change x and y

x=4y=8

switch sides

4y-8=x

add 8

4y=x+8

divide both sides by 4

y=1/4x+2

substitute f^-1(x) for y

f^-1(x)=1/4x+2