Hi, 

Using the vertex form of a parabola,  where(h,k) is the vertex

V(-2,4);P(3,-1) 

 x = a(y-4)^2 -2

3 = a(-5)^2 -2

 5/25 = a

 1/5 = a

,this is the Vertex form for parabola opening right and or left ( in this case >0, opens right.   



 

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