Content Standard: The learner demonstrates understanding of the linear inequalities in two variables, differentiate linear inequalities in two variables from linear equations in two variablesPerformance Standard:The learner is able to investigate thoroughly mathematical relationships in various situations, formulate real-life problems involving quadratic equations, inequalities and functions, and rational algebraic equations and solve them using a variety of strategies.The learner is able to verifying the solutions to a linear inequality in various situations. The learner demonstrates understanding the fundamentals of graphing a linear inequality in two variables. Can explain the process of finding and verifying the solutions to a linear inequality. And explains how to determine the solution to a system of linear inequality by graphing.