Respuesta :
If you wish to find the inverse of y=mx you must solve for x and then switch the labels for the varibles. (because the inverse of a function is really just switching of x and y coordinate pairs to y and x coordinates)
y=7.5x divide both sides by 7.5
y/7.5=x now switch variable labels...
y=x/7.5
y=7.5x divide both sides by 7.5
y/7.5=x now switch variable labels...
y=x/7.5