What is the equation of the parabola with a focus at (3,18) and a directrix of y= 23?
1 Answer
Jun 18, 2017
Equation of parabola is
Explanation:
Focus at
Vertex is at equidistant from focus and directrix.
So vertex is at
Since directrix is above vertex , the parabola opens downwards and
Hence equation of parabola is
graph{-1/10(x-3)^2+20.5 [-80, 80, -40, 40]} [Ans]