F (x) = 5x+4 find its inverse

To solve the inverse, one way to do it is simply rearranging or switching the X and y coordinate values, then solve for the new y coordinate.

Y = 5x + 4

X = 5y + 4

X - 4 = 5y + 4 - 4

5y = X - 4

5y/5 = X - 4/5

Y = (X - 4) / 5

The inverse of the original function is y = (X - 4) / 5.