Hi

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

y = -3x^2 -4

 1) parabola opens downward a = -3 < 0  Vertex Pt(0,-4) is a maximum pt

 2) Line of symetry is the y-axis

 3) relative to the the translation form the origin: down 4



 

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