Question

How do you find the inverse of `y=4x+7`?

Answer 1

`x= (y-7)/4`

Explanation:

You usually have your function expressed as `y=f(x)`, so that the `y` variable is isolated. To find the inverse function, you need to isolate the `x` variable, and express it as dependent of the `y` variable.

Solving by `x`, we have

`y=4x+7 \to`y-7 = 4x \to (y-7)/4 = x#

and there is your inverse function!