Is the relation a function?

RelationThe picture shows two rectangular boxes with one column of four numbers in each box.
Left box column numbers from top to bottom are: 3, 10, 11, 13
Right box column numbers from top to bottom are: 6, 6, 1, 13
Four arrows, one for each left box number, are pointing from left box numbers toward right box numbers:
number 3 in left box points to 2nd number 6 from the top in right box;
number 10 in left box points to number 13 in right box;
number 11 in left box points to number 1 in right box;
number 13 in left box points to 1st number 6 at top of right box
(1 point)
Responses

yes
yes

no

Yes.