Now, h = -b/2a. Plug in the values into the formula, and you get: The parabola's axis of symmetry (x = h) is a vertical line passing through the vertex, so as demonstrated above, this is x = 1.

The minimum point is the minimum y value that the parabola reaches. The maximum point is the maximum y value that the parabola reaches. The symmetry of the parabola is created because each x value ...