Question

What is the equation of the parabola, in vertex form, with vertex at (-2,-4) and directrix x = -6?

Answer 1

what is vertex form for a parabola?

Answer 2

Just like for other classes you will need to know definitions, you will also need the same thing for a math class.
If you can't remember the form, you could remember how a parabola is defined.

Choose a point on a parabola. That point will have the same distance as it does from the focus as it does from the directrix.


Say x=c is the directrix.