Derive the equation of the parabola with a focus at (-5, 5) and a directrix of y = -1. (2 points) Please help
1 answer:
We see that the the parabola opens up since directix is below the focus
for an parabolla opening up/down with vetex at (h,k) and the distance from teh vertex to the focus is p
the distance from vertex to directex is the same as from focus to directix
from (-5,5) and y=-1
that is a vertical distance of 6
vertex is in the middle
6/2=3
5-3=2
the vertex is at (-5,2)
the distance is 3
for an parabolla opening up/down with vetex at (h,k) and the distance from teh vertex to the focus is p
the distance from vertex to directex is the same as from focus to directix
from (-5,5) and y=-1
that is a vertical distance of 6
vertex is in the middle
6/2=3
5-3=2
the vertex is at (-5,2)
the distance is 3
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