About Graphing Lines
Jon Peppiatt · The Atrium (University of Guelph) · 2007
A line segment is composed of two points on a line and all the points between those two points. Line segments are generally used in mathematics to calculate the slope of the line between two points. The two points are typically called an ordered pair (or co-ordinates), with the first number being a value on the horizontal (or x) axis, and the second number being a value on the vertical (or y) axis.