The slope, m, is the change in y over the change in x between any two points, (x_{1},y_{1}) and
_{(}x_{2},y_{2),} on the line:
m = (y_{2}y_{1})/(x_{2}x_{1})
For A = (0,5) and B=(3,2), we have:
m = (2  5)/(3  0) = 3/3
m = 1
Try it yourself for the other sets of points.
5/20/2014

Philip P.