Question

Which one of the following is not a function:
(a) (2.1).(5.1).(8.1).(11.1).14.1))
() {(2,1).(2.3).(4,2).(5,6)
(e) (2.1).(4.2).(6,3).(8,4)}
(d) {(4.1).(6,2).18,3).00.4)​

Answer 1

Answer:

(b). (2,1 ). (2.3) . (4,2). (5,6)