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

f(x)= 1/4(x+9)²+1 

+ The vertex is  (-9,1) parabola opens Upward:  a = 1/4 > 0

+ The line of Symmetry is  x = -9

+ What is the max/min value of f(x): min value is 1 

+ Is the value of, f (-9)=1, a maximum or a minimum



 

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