Answer:
option (4)
Step-by-step explanation:
As a function x can only have one unique value that it maps to.
(1)
(10, 12 ) ← No since (10, 11 ) is already part of the function
(2)
(15, 13 ) ← No since (15, 18) is already part of the function
(3)
(17, 10 ) ← No since (17, 12 ) is already part of the function
(4)
(11, 13 ) ← Yes as no other value with x = 11
