Example: The lines 3"x"–2"y"=1 and 6"x"–4"y"=2 are coincident (same line). Here the factor is: "k"=2. We multiplied the first equation by 2 to get the second equation. The unique slope-intercept form of this line is: "y"=1.5"x"–0.5 (solve either equation for y).