# Slope Formula

The 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

Example

*In the figure, what is the slope of line passing through the two points?*

*A. 1/4*

B. 1

C. 1/2

D. 3/2

E. 2

B. 1

C. 1/2

D. 3/2

E. 2

The slope formula yields .

The answer is (C).