Question

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

A.
2x + 3y > 7

B.
x + y < 5

C.
3x + 2y < 1

D.
x − y ≤ 5

Answer 1

D

x − y ≤ 5

Explanation:

When drawing lines for inequalities in a graph, all lines whose equation have the greater than or less than signs are dotted hence they can't be solid boundary lines. Otherwise, all other equations with equal sign, less than or equal and greater than or equal are represented by a solid boundary line. In this case, the only equation that qualifies for a solid boundary line is x − y ≤ 5 since the other equations have either less than or greater than signs