Respuesta :

The function of the parabola can be expressed as :
(x - h)^2 = 4p (y - k)

Where the coordinate of the 
focus is (h + p, k) , the vertex (h,k) and the distance between the focus with the vertex is p.

The distance of focus and vertex would be -9-0=-9
Then the equation would be:
(x - h)^2 = 4p (y - k) 
(x - 0)^2 = 4*-9 (y - 0) 
x^2= -36y
y= -1/36 x^2

Answer:

so the answer is y= -1/36 x^2

Step-by-step explanation:

You can use this equation:

(x - h)^2 = 4p (y - k) to figure this problem out

(x - h)^2 = 4p (y - k)  

(x - 0)^2 = 4*-9 (y - 0)  

x^2= -36y

y= -1/36 x^2

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