I believe you would have to plug in for x and y. In this case, x is -3 and y is 1.
1=-1/3*-3 (-1/3 times -3 does equal to positive 1, so yes this is the ordered pair for this equation.)
4*1+12=3*-3 (4*1+12 equals 16 and 3*-3 equals -9. So, this ordered pair isn't for this equation.)