Find the axis of symmetry of the parabola defined by the given quadratic function.
-$$f ( x ) = ( x + 1 ) ^ { 2 } - 2$$
A) $x = - 1$
B) $x = 1$
C) $x = - 2$
D) $x = 2$ x

Question

Quizplus · Accepted Answer

The axis of symmetry of a parabola defined by a quadratic function in the form of $f(x) = a(x-h)^2+k$ is given by the equation $x=h$. 
In this case, the given quadratic function is $f(x)=(x+1)^2-2$, which is already in the form $f(x)=a(x-h)^2+k$, where $h=-1$ and $k=-2$. Thus, the axis of symmetry is given by $x=-1$, which corresponds to choice A).

Find the Axis of Symmetry of the Parabola Defined by the Given