For the function f(x) -4 sqrtx - 1, find the inverse function.

Step-by-step explanation:

We have the function: and we have to find the inverse.

Observation: , then

You can obtain the inverse of a function by switching the x and y values. This means:

We're going to call . Now we have to clear "y'".

First we have to add (1) in both sides of the equation:

Now divide in (-4) both sides.

And for our last step we have to square both sides:

Then the third option is the correct: