Slope

When we think about the slope graphically, we need to understand what "rise over run" or "change in 'y' over change in 'x' " means. You can start at any point on a line and determine the slope of that line by looking at how much you "rise" or go up on the y-axis divided by the amount you "run" or move to the right on the x-axis.
For example,



Also, the slope can be negative so you would fall instead of rise or you would run backwards, to the left, instead of to the right.
For example,