Answer:
Slope is rise over run. so, if you have a line of best fit, you go from one point to the next. Up 1 would be 1 down one would be -1. right 1 would also be 1, left one is -1. After you get the rise over run (Say it's 5/4) then you divide rise over run. 1.25 is the slope of this one. post this question with a picture of a graph and i'll gladly help