Question

what is the length of $overline{bc}$?

Explanation:

Step1: Identify coordinates

The coordinate of point B is 91 and the coordinate of point C is 93.

Step2: Calculate distance

The distance between two points on a number - line is given by the absolute value of the difference of their coordinates. So, \(BC=\vert93 - 91\vert\).
\(BC = 93-91=2\)

Answer:

2