PLEASE HELP ASAP

Which set of ordered pairs does NOT represent y as a function of x?

{(1, 1), (2, 1), (3, 1)}

{(1, 1), (2, 2), (2, 3)}

{(1, 2), (1, 3), (1, 1)}

{(1, 2), (2, 3), (3, 3)}

You were told that the amount of time lapsed between consecutive trades on the new york stock exchange followed a normal distribution with a mean of 15 seconds. you were also told that the probability that the time lapsed between two consecutive trades to fall between 16 to 17 seconds was 13%. the probability that the time lapsed between two consecutive trades would fall below 13 seconds was 7%. what is the probability that the time lapsed between two consecutive trades will be between 14 and 15 seconds?