Hi,

the vertex form of a Parabola opening right(a>0) or left(a<0), 

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

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

parabola with its vertex at (-1, 2) and its focus at (4, 2) 

, ,  p = 5,  4p = 20

,  



 

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