To find an inverse function:
1. Write the function.
2. Replace f(x) with y.
3. Switch x and y.
4. Solve for y.
5. Replace y with [tex] f^{-1}(x) [/tex]
Now let's follow the steps above and do it.
1. f(x) = 4x
2. y = 4x
3. x = 4y
4. y = x/4
5. [tex] f^{-1}(x) = \dfrac{x}{4} [/tex]
