SOLUTION: Choose the equation of the parabola with a vertex at the origin and a focus at (0, –3). a. y=-1/3x b. y=1/12x^2 c. y=-1/3x^2 d. y=-1/12x^2

Algebra ->  Quadratic-relations-and-conic-sections -> SOLUTION: Choose the equation of the parabola with a vertex at the origin and a focus at (0, –3). a. y=-1/3x b. y=1/12x^2 c. y=-1/3x^2 d. y=-1/12x^2      Log On


   

Question 416376: Choose the equation of the parabola with a vertex at the origin and a focus at (0, –3).
a. y=-1/3x
b. y=1/12x^2
c. y=-1/3x^2
d. y=-1/12x^2
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

 The standard form is %28x+-h%29%5E2+=+4p%28y+-k%29, where the focus is (h,k + p) 

  x^2 = 4py     p = -3    4p = -12

 x^2 = -12y  OR  y = -(1/12)x^2