Question 221480
y=-3(x+3)^2 is in form y=a(x-h)^2+k ---> a=-3, h=-3, k=0


Vertex: (-3,0) 
Line of Symmetry: x=-3


Graph 


 {{{ graph( 300, 200, -6, 5, -10, 10, -3(x+3)^2) }}}