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Find Quadratic Line of Symmetry

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Find Quadratic Line of Symmetry
Axis 1

Green parabola: y = x^2 + 2x; Red line: Line of Symmetry

Jennifer Ledwith

A parabola is the graph of a quadratic function. Each parabola has a line of symmetry. Also known as the axis of symmetry, this line divides the parabola into mirror images. The line of symmetry is always a vertical line of the form x = n, where n is a real number.

This tutorial focuses on how to identify the line of symmetry. Learn how to use either a graph or an equation to find this line.

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