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Definition

Parabola

A parabola is the set of all points in a plane that are equidistant from a fixed point, called the focus, and a fixed line, called the directrix. When a quadratic equation in two variables, such as y=x2y = x^2, is graphed by plotting points, the resulting figure is a continuous U-shaped curve rather than a straight line. Every quadratic equation produces a graph with this characteristic parabolic shape. In the study of conic sections, a parabola is produced when a plane slices through a cone parallel to the cone's slant.

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Updated 2026-05-19

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