Learn Before
Definition

Axis of Symmetry of a Parabola

In a parabola, the axis of symmetry is the "fold line" that divides the U-shaped curve into two mirror-image halves. If the parabola is folded along this vertical line, one side lies exactly on top of the other. The axis of symmetry always passes through the center of the parabola. For a parabola described by the quadratic equation y=ax2+bx+cy = ax^2 + bx + c, the axis of symmetry is given by the formula:

x=b2ax = -\frac{b}{2a}

Image 0

0

1

Updated 2026-04-21

Contributors are:

Who are from:

Tags

OpenStax

Elementary Algebra @ OpenStax

Ch.10 Quadratic Equations - Elementary Algebra @ OpenStax

Algebra

Math

Prealgebra

Related
Learn After