Question

If the directrix of a parabola is the horizontal line y = 3, what is true of the parabola?

Answer 1

The correct answer is b), or x² = -12y.

Explanation:
This equation may be written in standard form as
$y=- \frac{1}{12} x^{2}$
The coefficient in front of x² is negative so the curve is downward.
The vertex has coordinates (0,0).
The vertex is equidistant from the directrix and the focus, so the focus is (0, -3).

Answer 2

Answer: on e2020 it’s b

Step-by-step explanation: