Hi,

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

where(h,k) is the vertex  



Assume you meant: 

  

parabola opening Upward a = 3 > 0,    Vmin(4,-51)

a. Is f(4) a minimum or maximun

 b. What is the value?  -51

 c. The domain of f is?  x is any real number

 d. The range of f is?   f(x) > -51





 

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