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Which of the following functions has a smooth U-shaped graph that is symmetric about the y-axis and touches the x-axis at the origin?

Answer and explanation

Correct answer: \(y=x^2\)

The graph of \(y=x^2\) is a parabola symmetric about the y-axis, with its minimum at \((0,0)\) and a horizontal tangent there. Although \(y=|x|\) is also symmetric, it has a sharp corner at the origin. Exam tip: a smooth U-shape indicates a parabola.

Related tags

Standard FunctionsQuadratic FunctionGraphsParabolaSymmetryClass 11 MathematicsGraphs Of Standard FunctionsRelations And Functions

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