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Where does the vertex move when (y=x^2) is changed to (y=(x+5)^2-2)?

Answer and explanation

Correct answer: ((-5,-2))

The direct answer is option B, (-5,-2). The basic parabola y=x^2 has vertex (0,0). The vertex form y=(x-h)^2+k has vertex (h,k). Here x+5 can be written as x-(-5), so h=-5, and k=-2. Therefore the new vertex is (-5,-2). Equivalently, replacing x by x+5 shifts the graph 5 units left, while subtracting 2 shifts it 2 units down. Option B is correct. Option A, (5,-2), has the horizontal sign reversed; x+5 means left, not right. Option C, (-5,2), has the vertical sign reversed; -2 means downward. Option D, (2,-5), swaps the coordinate roles and does not match vertex form. A safe rule is x-h gives horizontal movement h, and the outside constant gives vertical movement directly. The supplied explanation and answer are correct.

Related tags

GraphsQuadraticTranslation

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