Question

Find the equation of the straight line passing through $(1,2)$ and having slope $1$

Answer 1

Given:Slope$=1$

Point is $(1,2)$

Equation of the line is $y-y_1=m(x-x_1)$

$y-2=1(x-1)$

$\Rightarrow y-2=x-1$

$\Rightarrow x-y-1+2=0$

$\therefore$Equation of the line is $x-y+1=0$