Find the inverse of the function f(x)= -5x How would I do this?

1 Answer
Dec 27, 2017

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

Explanation:

Replace f(x) with y

y=-5x

Replace y with x and vice versa:

x=-5y

Solve for y:

-x/5=y (Divide by -5 to isolate y)

y=-x/5 (Rewrite so that y is the subject of the equation)

therefore f^-1(x)=-x/5