Slope FormulaThe slope of a line measures the inclination of the line. By definition, it is the ratio of the vertical change to the horizontal change (see figure below). The vertical change is called the rise, and the horizontal change is called the run. Thus, the slope is the rise over the run.
Forming the rise over the run in the above figure yields
In the figure, what is the slope of line passing through the two points?
The slope formula yields .
The answer is (C).