Equation of the line passing through $(1, 2)$ and having slope $1$

x - y + 3 = 0

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x - y - 3 = 0

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x - y + 1 = 0

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x + y + 1 = 0

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Solution

The correct option is C $x - y + 1 = 0$
Slope of line is $1$
Passing through $(1, 2)$
The equation of line is $y - 2 = 1 (x - 1) y - 2 = x - 1 x - y + 1 = 0$

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