Linear Inequalities

Introduces inequality notation (<, ≤, >, ≥) and the algebra of inequalities, including when the inequality sign reverses. Covers solution sets of linear inequalities in one variable (expressed on the number line and in interval notation) and in two variables (graphing half-planes using boundary lines that are solid or dashed). Extends to systems of linear inequalities and the feasible region, with applications to real-life constraints and word problems.