HELP ME PLEASE! Which set of points would define a function?
o {(5,3), (-2,7), (7,-2), (5,-3)}
o {0,2), (-3,1), (4,-5), (7,4)}
O {(3,3), (2,7),(1,3), (3,1)}
o {(4,9),(-4,0),(4, -5),(-4,-9)}