Question 49035
Slope is defined as {{{(y2 - y1)/(x2 - x1)}}} with your two points being: (x1,y1) and (x2,y2)
Ex.) P(1,2) and P(2,4)
x1 = 1 and y1 = 2
x2 = 2 and y2 = 4
M = (y2 - y1)/(x2 - x1) = (4 - 2)/(2 - 1) = 2/1 = 2
It does not matter which point is (x1,y1) as long as the x1 is paired with the y1.