What is the following parabola's axis of symmetry?
$y = x^{2} - 2 x - 3$

x = 1

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x = - 1

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y = 1

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None of these

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Solution

The correct option is D $x = 1$
$y = x^{2} - x - 3$
$x = - \frac{b}{2 a}$
$x = - \frac{- 2}{2 (1)}$ = $1$
$x = 1$

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