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What is the \(y\)-intercept of the boundary line of \(2x+3y\leq 12\)?

Answer and explanation

Correct answer: 4

To obtain the boundary line, write the inequality as \(2x+3y=12\). At the \(y\)-intercept, \(x=0\). Thus, \(3y=12\), so \(y=4\). Therefore, option 4 is correct. Setting \(y=0\) gives the \(x\)-intercept, not the \(y\)-intercept. Exam tip: always set \(x=0\) to find a line's \(y\)-intercept.

Related tags

Linear InequalitiesY-InterceptBoundary LineCoordinate GeometryGraphical SolutionGraphical Solution Of Linear Inequalities In Two VariablesMathematicsClass 11 Mcq

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