Geometry

Question Analysis

This question involves the concept of finding the distance between two points on a number line.

 

Key Concept Explanation

The length of a line segment between two points on a number line is found by taking the absolute - value of the difference between their coordinates. 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 7 and the coordinate of point is 3.

2. Calculate the length of .

Use the formula