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What is the \(y\)-intercept of the boundary line of \(y\ge \frac{1}{2}x-3\)?

Answer and explanation

Correct answer: \(-3\)

To obtain the boundary line, replace \(\ge\) with equality: \(y=\frac{1}{2}x-3\). For the \(y\)-intercept, put \(x=0\), giving \(y=-3\). Therefore, the correct answer is \(-3\). Here, \(\frac{1}{2}\) is the slope, not the \(y\)-intercept. Exam tip: in \(y=mx+c\), \(c\) is the \(y\)-intercept.

Related tags

Linear InequalitiesY-InterceptBoundary LineCoordinate GeometryClass 11Graphical Solution Of Linear Inequalities In Two VariablesMathematicsClass 11 Mcq

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