Question

find the equation of the axis of symmetry for the parabola ( y = x^2 - 9 ). simplify any numbers and write them as proper fractions, improper fractions, or integers.

Explanation:

Step1: Recall parabola axis formula

For parabola $y=ax^2+bx+c$, axis is $x=-\frac{b}{2a}$.

Step2: Identify coefficients

From $y=x^2-9$, $a=1$, $b=0$, $c=-9$.

Step3: Calculate axis of symmetry

$x=-\frac{0}{2\times1}=0$

Answer:

$x=0$