Geometry

Question Analysis

This question involves the concept of determining the length of a line segment on a number line.

 

Key Concept Explanation

The length of a line segment between two points on a number line is given by the absolute value of the difference between their coordinates. That is, if the coordinates of two points are and , the distance .

 

Step - by - Step Solution

1. Identify the coordinates of points and .

From the number line, the coordinate of point is 3 and the coordinate of point is 1.

2. Calculate the length of