If a straight line $y = 2 x + k$ passes through the point $(1, 2)$ then the value of $k$ is equal to:

0

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4

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5

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- 3

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Solution

The correct option is B $0$
$if straight line y=2x+k passes through the point (1,2), then (1,2) satisfies this line.$
$\Rightarrow 2 = 2 (1) + k$
$\Rightarrow k = 0$

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