Learning goals: Teacher Facing Given the graph of a related equation, determine the solution region to an inequality in two variables by testing the points on the line and on either side of the line. Understand that the solutions to a linear inequality in two variables are represented graphically as a half-plane bounded by a line. Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from Alg1.2 Linear Equations, Inequalities, and Systems, Algebra 1.