A parabola that has a horizontal directrix is a parabola that opens up or down.
Here are some of its components: 1) Standard equation of a parabola with a horizontal directrix: (x-h)^2 = 4a(y-k), a = distance from vertex to focus 2) Vertex at (h,k) 3) Focus(h,k+a) 4) Directrix: y = k-a 5) Axis of symmetry: x = h
A parabola that has a vertical directrix opens to the right or left and is on its side.
Here are some components 1) Standard equation of a parabola with a vertical directrix: (y-k)^2 = 4a(x-h) 2) vertex (h,k) 3) focus (h+a,k) 4) directrix: x = h-a 5) Axis of symmetry: y = k
