Question

a parabola can be drawn given a focus (4,-11) and a directrix of y=7. write the equation of the parabola in any form

Answer 1

Answer: The vertex will have the same x coordinate as the focus

and be at the midpoint between focus and directrix.  The

midpoint of (4, 4) and (4, -2) is:  ((4+4)/2, (4-2)/2) = (4, 1)