This is the equation. Try it for yourself and see if it works.
C= n x 4
Well. Check out @GiannaSmart0 For the answer ! Great
For this case we have the following function:

We change the variables:

From here, we clear the value of y.

Then, we make the following change:

Finally, the inverse function is:

Answer:
The inverse of the given relation is:

hmmmm i think there is another part of this