Answer:
TRUE
Explanations:
The boundary of an open half plane is defined by a point. This point divides the plane into two.
A dashed boundary line shows that the inequality does not include that line while a solid or continuous line means that the inequality graph includes the boundary line. Recall that If the inequality is a “>” or “<”, then the graph will be an open half‐plane and since an open half-plane does not include a boundary line, the line is represented as a dashed line on the graph.
Based on the explanations above, we can conclude that an open half-plane has a dashed line for the boundary showing that the statement is TRUE