Question

Which inequality's graph will have a solid boundary line?


2x + 3y > 7



x + y < 5



3x + 2y < 1



x − y ≤ 5

Answer 1

We use solid boundary lines when we have \(\le or \ge\).

Answer 2

dotted lines do not have the equal sign
solid lines have an equal sign

Answer 3

dotted lines > or < mean that the line itself is not a solution
when the equal sign is included under the inequality that means the line itself is also a solution