Looking at an example of finding the length of a One-Dimensional Line, take AB on the following number line.
The first step is to identify both the coordinates of Point A, which is 4 and Point B, which is 6.
To find the length of AB we can use the following equation:
Plugging the coordinate of Point B in for x2, and the coordinate of Point A in for x1. We get the following situation.
Simplifying the equation finds us the length of AB.