Which relation is a function?
•{(4, 2), (3, 3), (2, 4), (3, 2)}
•{(1, 4), (2, 3), (3, 2), (4, 1)}
•{(1, -1), (-2, 2), (-1, 2), (1, - 2)}
• {(1, 2), (2, 3), (3, 2), (2, 1)}

•{(1, 4), (2, 3), (3, 2), (4, 1)}

Step-by-step explanation:

The second answer is the function because all the other choices show the x values repeated and the second answer has all x values unique.

I'm not very good at explaining but that's the answer.

•{(1, 4), (2, 3), (3, 2), (4, 1)}

Step-by-step explanation:

this is correct because the values are not repeted

y=1/4x-4

step-by-step explanation:

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