Hi,

Note: vertex form of a Parabola opening up(a>0) or down(a<0),  

where(h,k) is the vertex  and  x = h  is the Line of Symmetry

The standard form is , where  the focus is (h,k + p)

 ,  V(0,0), 4p = 12,  p = 3, F(0,3) and directrix is y = -3



 

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