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What is the status of \((3,1)\) for \(2x+y\leq 7\)?

Answer and explanation

Correct answer: In the solution

Substituting \((3,1)\) into the inequality gives \(2(3)+1=7\). Since \(7\leq 7\) is true, the point belongs to the solution region. It lies on the boundary line \(2x+y=7\), and the boundary is included because the inequality contains \(\leq\). Option C is incorrect because the point does not lie on either axis. Exam tip: Test a point by directly substituting its coordinates into the inequality.

Related tags

Linear InequalitiesGraphical SolutionPoint TestBoundary LineCoordinate GeometryGraphical Solution Of Linear Inequalities In Two VariablesMathematicsClass 11 Mcq

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