Question

qursiong in coments

Answer 1

if there is x repeat in one relation than that is not function
for example
( 2, 3) (2 , 5)
this is not function bec x is 2 and its repeating

Answer 2

(3 , 4) ( 4, 4)
is this function yes bec only y are same but we in order to not function x value should be repeat
make sense ??

Answer 3

so whats your answer should be

Answer 4

according to that none of them are functions .. ?

Answer 5

mm there is one answer :)

Answer 6

okay maybe C ? but it only has 1 relation ..

Answer 7

ok for example first one you have
x values are repeat