Which of the relations given by the following sets of ordered pairs is not a function? o {(-5,2), ( – 3,3), (0, 6), (0,4), (2, 1)}
o {(0, – 8), (1, – 8), (2, – 8), (3, – 8), (4, - 8)}
o {(-6, - 1), (-4, - 2), (-9, - 5), (-3, -1), (- 1, – 7)}
o {( – 4,7). ( - 2,5), (- 1,3), (2,5),(4, - 6)