What does a dotted line on a graph mean?

Related questions

1. What is a straight line graph called?
2. When would you use a line plot?
3. How do you insert a limit line in Excel graph?
4. How do I plot two graphs on the same axis in Excel?
5. What is a double line graph?
6. What are the disadvantages of graphs?
7. When would you use a column chart?
8. When would you use a line graph?
9. How do you know if a graph is a straight line?
10. What is a disadvantage of a bar graph?

Tags

1. #graphing
2. #inequalities
3. #regions
4. #dotted
5. #plane
6. #graph
7. #equation
8. #satisfies
9. #region
10. #solid
11. #inequality
12. #divides