0
y2-y1
___
x2-x1
first find any two points on a line
then take the second point's (y) and subtract it from the first points (y)
then divide by the second (x) subtracted by the first points (x) like the (y)
the first (x,y) is the left dot of your two dots and the second (x,y) is the right dot of the two
the result is the slope of the line of the graph
ex. (8,7) (13,11)
(11-7) / (13-8)
slope = 4 / 5
(4up and 5 over)
hope this helped :)
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