Axis of Symmetry of a Parabola
The axis of symmetry of a parabola is the vertical line through the vertex. For a parabola in standard form, y = ax2 + bx + c, the axis of symmetry has the equation
Example:
Find the axis of symmetry.
y = 2x2 + x – 1
Here, a = 2 and b = 1. So, the axis of symmetry is the vertical line
