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For the inequality y > 2x − 1, on which side is the origin?

Answer and explanation

Correct answer: In the solution region

The standard origin test determines which half-plane satisfies a linear inequality. Substitute the origin (0, 0) into y > 2x − 1: 0 > 2(0) − 1, which becomes 0 > −1. This statement is true, so the origin lies in the solution region. It is not on the boundary, because the boundary equation is y = 2x − 1; when x = 0, the boundary point has y = −1, not y = 0. Also, the strict sign > excludes the boundary itself. Therefore option A is correct. The test is useful because a linear boundary divides the plane into two half-planes, and checking one point identifies the required side without needing to shade the entire graph.

Related tags

Linear InequalitiesOrigin TestHalf-PlaneBoundary LineGraphical Solution Of Linear Inequalities In Two VariablesMathematicsClass 11 Mcq

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