Question 655710
To find the inverse of a function you simply put it to 'y' and make 'x' the subject

f(x) = 2x + 5
y = 2x +5
y - 5 = 2x
(y-5)/2 = x

Then you interchange x with y
Therefore you should now have y = (x-5)/2

f^-1(x) = (x-5)/2
Domain is all real numbers