Find the axis of symmetry of the curve (y = x^{2} – 4x – 12).
-
A.
x = -2 -
B.
y = -2 -
C.
x = 2 -
D.
y = 2
Correct Answer: Option C
Explanation
The vertical line (x = frac{-b}{2a}) is the axis of symmetry of the curve.
(y = x^{2} – 4x – 12)
(text{Axis of symmetry} = x = frac{-(-4)}{2(1)} = frac{4}{2} = 2)