Which of the following sets of ordered pairs does not define a function? {(−14)} { ( − 1 , 4 ) , ( 0 , 4 ) , ( 1 , 4 ) , ( 2 , 4 ) , ( 3 , 4 ) } {(114)} { ( 1 , 2 ) , ( 5 , 6 ) , ( 6 , 7 ) , ( 10 , 11 ) , ( 13 , 14 ) } {(15)} { ( 1 , 1 ) , ( 2 , 2 ) , ( 3 , 3 ) , ( 4 , 4 ) , ( 5 , 5 ) } {(12)}

Luke started a weight-loss program. the first week, he lost x pounds. the second week, he lost pounds less than times the pounds he lost the first week. the third week, he lost 1 pound more than of the pounds he lost the first week. liam started a weight-loss program when luke did. the first week, he lost 1 pound less than times the pounds luke lost the first week. the second week, he lost 4 pounds less than times the pounds luke lost the first week. the third week, he lost pound more than times the pounds luke lost the first week.