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What is the range of \(x\)-values for the bounded region enclosed by the parabola \(y=x^2\) and the line \(y=4\)?

Answer and explanation

Correct answer: \(-2\le x\le 2\)

At the intersection points, the two curves have equal \(y\)-values, so \(x^2=4\). Thus, \(x=-2\) and \(x=2\). The finite region lies between these two intersection points, giving \(-2\le x\le2\). Option B incorrectly excludes the negative \(x\)-values. Exam tip: To find the horizontal extent of a bounded region, first solve the equations of the two boundaries simultaneously.

Related tags

GraphsStandard-FunctionsParabolaIntersectionBounded-RegionGraphs Of Standard FunctionsRelations And FunctionsMathematics

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