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What is the axis of symmetry of the parabola \(y=(x+2)^2-7\)?

Answer and explanation

Correct answer: \(x=-2\)

For a parabola in vertex form \(y=(x-h)^2+k\), the axis of symmetry is \(x=h\). Here, \(y=(x-(-2))^2-7\), so \(h=-2\), giving the axis \(x=-2\). The value \(y=-7\) is the vertex's y-coordinate, not the axis of symmetry. Exam tip: reverse the sign of the constant appearing with \(x\) inside the square to identify \(h\).

Related tags

GraphsQuadratic FunctionsAxis Of SymmetryVertex FormStandard Equations And Simple Properties Of A ParabolaConic SectionsMathematicsClass 11 Mcq

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