Which relation is a function? A:{(1, 1), (2, 4), (4,8), (8, 16),
(8,32)}
B: (8, -2) , ( 9, -2) , (10, -2) (11, -2), (12,3)
C: (2,-3), (2,-2), (2,-1), (2,0), (2,1)
D: (9,3) , (9,-3), (16,-4), (25,-5)

1,2,4,8,16,32,36,40,48

the answer would be d

straight away you can eliminate a and c because not all books contain a scientific skill because some may be fiction. c is also wrong because it saids that the only way children can learn is through books which is incorrect.

b is also wrong because reading can be a scientific skill but not always, therefore it is wrong which leaves you with d, the correct answer since it said that it can children learn.

hope this ! : 3