Hi,



Note: the 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

Parabola opens Upward, V(0,5) , y-axis the line of symmetry (x=0) (2,9) &(-2,9)are Pts on this parabola 

Always good idea to sketch any curve



 

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