Question 40448
using the formulas for parabolas, graph and write the equations of parabolas with the following properties. Graph an extra point other than a vertex. The Parabola with focus (0, 5) and directrix y= -5.

Draw the picture.  Do you see that the parabola must be opening upward.
Therefore the general form is x^2=4py
P is half the distance from the directrix to the focus or p=5
EQUATION:
x^2=4(5)y
y=(1/20)x^2

An extra point would be (1,1/20)
Cheers,
Stan H.