The slope of a line segment is the steepness of the line. It is the ratio of the rise (vertical) over the run (horizontal).

Horizontal lines have a slope of 0, and vertical lines have an undefined slope.

In math, slope is represented by the letter m.

**Slope Formula**: The slope of a line can be determined even without the graph as long as you have the two points and the slope formula. The formula is as follows:

M=

Example: Determining the slope of points A (4,5) and B (2,1)