Which set of ordered pairs (x, y) could
represent a linear function?
A={(-5,2), (2-1), (1.-4), (5-7)}
B={(-5,5), (1,2), (5,0), (9-2)}
C={(-1,-1), (0,1), (1,3), (2,6)}
D={(3-4), (0-3), (3-2). (6-1)}