The line of symmetry of a parabola which divides the parabola into two equal halves that are reflections of each other about the line of symmetry. It also intersects the parabola at the vertex.
Find the vertex, which is the lowest or highest point of a parabola. Bonus:
The line of symmetry touches the parabola at the vertex.
The axis of symmetry is also defined by the following equation:
x = -b/2a
Always keep in mind that a quadratic function has the following form:
y = ax2 + bx + c
Follow 4 steps to use an equation to calculate the line of symmetry for y = x2 + 2x
-Identify a and b for y
-Plug into the equation x = -b/2a
-Simplify
-You have your line of symmetry.
Hope this helps!
