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Vertex of a Horizontal Parabola

The vertex of a horizontal parabola is the point where the curve intersects its axis of symmetry. For the standard form equation x=a(yk)2+hx = a(y - k)^2 + h, the vertex is the point (h,k)(h, k). For the general form equation x=ay2+by+cx = a y^2 + b y + c, the yy-coordinate of the vertex is found by using the axis of symmetry formula y=b2ay = -\frac{b}{2a}, and the xx-coordinate is calculated by substituting this yy-value back into the original equation to solve for xx.

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Updated 2026-05-25

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