## Algebra: A Combined Approach (4th Edition)

$7x+6y=0$
Origin means $(0,0)$. $(0,0)$ and $(6, -7)$ $m=\frac{-7-0}{6-0}$ $m=\frac{-7}{6}$ $m=-\frac{7}{6}$ $(y-y_1)=m(x-x_1)$ $(y-0)=(-\frac{7}{6})(x-0)$ $y=-\frac{7}{6}x$ $6y=-7x$ $7x+6y=0$