A boundary line that is dashed is represented by the inequality symbol: ?

A boundary line that is dashed represents an inequality symbol called strict inequality. It is represented by either "<" (less than) or ">" (greater than).

To determine whether a boundary line should be dashed or solid, you need to consider the type of inequality in the given problem. If the inequality involves "greater than" or "less than," you use a dashed line. If the inequality involves "greater than or equal to" or "less than or equal to," you use a solid line.

For example, if the inequality is represented as y < 2x + 3, the boundary line will be dashed. This indicates that the line does not include the points on the line itself; it only represents values that are less than the line.