If (9,12) is one end of a double ordinate of the parabola $y^{2} = 16 x$ then its equation is

x+9=0

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y+9=0

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y-9=0

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x-9=0

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Solution

The correct option is D
x-9=0

$y^{2} = 16 x A = (9, 12)$
Eqn of double coordinate x-9=0

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