what is y when (2, y), (4, 5), m= 2
what is y when (-5, 3), (3,y), m= -1/2
what is y when (-1, 5), (3,y), m= 5
what is y when (5, 7), (8, y), m= 4/3
what is y when (2, -15), (5, y), m= 4/5