Description: Sal finds the slope of a linear relationship between the number of work hours and the money earned. He then interprets what this slope means in that context. Created by Sal Khan and Monterey Institute for Technology and Education. So just as a bit of review, slope just equals the change in the dependent variable divided by the change in the independent variable. In this situation, the dependent variable is the amount of money you make because it is dependent on how much time you work, this is independent. So let's call the independent variable x, the dependent variable y.*Teacher Advisor is 100% free.