Question

What is the inverse of the function? f(x) = 1/4 x + 10

Answer 1

f ' (x) = 4x - 40

Explanation:

`f(x)=(1)/(4) x+10\\y=(1)/(4) x+10\\`

Switch y and x for inverse

`x=(1)/(4) y+10\\x-10=(1)/(4) y\\y=4*(x-10)\\f'(x)=4x-40`