For two variable inequalities which has equal to inequal sign is shown in the graph as a solid line.
An algebraic expression of two variables having equal to inequal sign or inequal sign with it. such as ≥ and ≤ are equal to inequal sign and < and > are inequal sign.
The way we solve linear equation is similar to solve the inequalities. The inequalities which have equal to inequal sign ≤ or ≥ is plotted on the graph and identify the boundary with solid line.
hence, we indicate an equal to inequality on a graph for variables by solid line.
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