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For \(2x-y\le 5\), which test correctly describes the side containing the origin?

Answer and explanation

Correct answer: The origin is in the solution because \(0\le 5\) is true.

Substituting the origin \((0,0)\) gives \(2(0)-0=0\). Thus, \(0\le 5\) is true, so the origin lies in the solution region and the half-plane containing it is shaded. Option C is incorrect because a point lies on the boundary only if \(2x-y=5\); at the origin, the left-hand side is \(0\), not \(5\). Exam tip: If the origin is not on the boundary line, substitute it to identify the correct shaded side quickly.

Related tags

Linear InequalitiesOrigin TestGraphical SolutionHalf PlanesClass 11Graphical Solution Of Linear Inequalities In Two VariablesMathematicsClass 11 Mcq

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