Parabolas

Parabolas

Opens Vertically

The equation of a parabola with vertex at (h, k) that opens in the "y-direction" is y = a(x - h)2 + k. The direction of opening is determined by the value of a. If a < 0, it will open down. If a > 0, it will open up. This form is exactly the same as a translated parabola from previous lessons. These parabolas will have the following properties:

Focus: OpensV1-1

Directrix: OpensV1-2

Axis of symmetry: OpensV1-3