Olympiad Geometry · Medium problem

$y = \tfrac{3}{2}x + \tfrac{9}{2}$

$y = -\tfrac{2}{3}x + \tfrac{9}{2}$

$y = -\tfrac{3}{2}x + \tfrac{9}{2}$

$y = -\tfrac{3}{2}x + \tfrac{9}{3}$