y = -x^2 - 6x - 7 what is the axis of symmetry and vertex?
The axis of symmetry can be found by using -b / 2a.
y=-x^2-6x-7..
-(-6) / 2(-1)= 6/-2=-3- which is the axis of symmetry.
Put x=-3 back into the equation...
y=-(-3)^2-6(-3)-7=2.
Thus, the vertex is (-3,2).
