Question 606047
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Hi,
Note: the vertex form of a parabola opening up or down, {{{y=a(x-h)^2 +k}}} where(h,k) is the vertex.
f(x)= 1/3(x+5)^2 + 3  |Note 1/3>0 , parabola opens upward
Vertex is Pt(-5,3)min
Line of symmetry is x = -5
{{{drawing(300,300, -10,10,-10,10,blue(line(-5,10,-5,-10)),  
 grid(1),
circle(-5, 3,0.4),
graph( 300, 300, -10,10,-10,10,0,(1/3)(x+5)^2 + 3))}}}