Answer:
The value of FG is 15
Explanation:
The information given is that the total distance of the line segment is 21, represented by the points EG. Also, the graph gives you the distance between the points EF that is equal to 6.
You can see from the graph that the total distance of the line segment EG is equal to the sum of line segments EF and EG.
So to find the value of FG you subtract the total distance of the line segment EG and EF.
![EG=EF+FG\\ 21=6+FG\\ FG=21-6=15](https://img.qammunity.org/2020/formulas/mathematics/middle-school/cqcaiq2iwhc6u7k6ab5xpzsg13p6iads05.png)