Question

How do you determine if the boundary line should be dashed or solid?

How do you determine which side of the boundary line to shade?

Answer 1

Dashed boundary are when they are < or > and solid when they have the line under the > or

Answer 2

Explanation:

Shade the top side of the boundary line if you have the inequality symbols > or ≥. Shade the bottom side of the boundary line if you have the inequality symbols < or ≤.