SOLUTION: Equation of the parabola whose vertex is(-2,0) and directrix x=1 is options a)y²=-2(x+2) b)y²=-4(x+3) c)y²=-6(x-5) d)y²=-12(x+2)

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Question 323141: Equation of the parabola whose vertex is(-2,0) and directrix x=1 is
options
a)y²=-2(x+2)
b)y²=-4(x+3)
c)y²=-6(x-5)
d)y²=-12(x+2)
Answer by galactus(183) About Me  (Show Source):
You can put this solution on YOUR website!
The parabola opens in the negative x direction.
It has an equation of the form %28y-h%29%5E2=-4p%28x-k%29
Where (h,k) are the coordinates of the vertex. p is the distance from the directrix to the vertex or from the focus to the vertex. In this case, p=3
y%5E2=-12%28x%2B2%29