The correct explanation of slope that could help Briella remember the formula is:
Slope is the ratio of rise over run. When given two points, you can determine the rise by finding the difference between the y-coordinates. You can determine the run by finding the difference between the x-coordinates.
This explanation accurately describes the concept of slope as a ratio of the change in the y-values (rise) to the change in the x-values (run) between two points on a line.