Take two different points A and B on a line as in the diagram below.

The rise is the difference between the -coordinates of the two points and the run is the difference between their x-coordinates. The ratio of the rise to the run is called the slope of the line. This is often designated by the letter m so

the slope of the line = m = rise/run.

Penny

Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences.