$\displaystyle y=- \frac{2}{3}x+ \frac{4}{3}$\displaystyle y=- \frac{2}{3}x+ \frac{4}{3}

$\displaystyle y= \frac{2}{3}x+ \frac{4}{3}$\displaystyle y= \frac{2}{3}x+ \frac{4}{3}

$\displaystyle y= \frac{3}{2}x- \frac{4}{3}$\displaystyle y= \frac{3}{2}x- \frac{4}{3}

$\displaystyle y=- \frac{3}{2}x- \frac{4}{3}$\displaystyle y=- \frac{3}{2}x- \frac{4}{3}