How to find vertice, line of symmetry of a parabola>?

belly · 04-29-2009, 11:32 PM

What are the formulas used to How to find vertice, line of symmetry of a parabola>?

gcf101 · 04-30-2009, 12:29 AM

1.
If you are given two points on a parabola (or a circle for that matter) with the same y-coordinate, the average of those points x-coordinates is the vertex (or the circle's center, respectively) x-coordinate.

2.
For y=ax^2+bx+c: vertex x=-b/(2a).

3.
For y=a(x-k)^2+h: vertex is in (k, h).