What is the standard form of the equation of the parabola with a directrix at x=7 and a focus at (12,-15)?

1 Answer
Binayaka C.
Mar 5, 2016

Equation of Parabola is x=1/10*(y+15)^2+9.5

Explanation:

Vertex is at mid-point between vertex and directrix. So vertex is at (9.5, -15) The equation of Parabola is x = a*(y+15)^2+9.5 now a= 1/(4*d) where d is distance between vertex and focus :. a =1/(4*2.5) or a=1/10 So Equation of Parabola is x=1/10*(y+15)^2+9.5 graph{x=1/10*(y+15)^2+9.5 [-80, 80, -40, 40]} [Answer]

Related questions
See all questions in Polynomials in Standard Form
Impact of this question
1462 views around the world
You can reuse this answer
Creative Commons License