Answered

Which relations are functions and which are not functions?

Column A Column B

1.

{(2, 2), (4, 4), (6, 6),

(8, 8)}

2.

{(0, 3), (3, 5), (5, 6),

(8, 4)}

3.

{(1, 2), (3, 3), (4, 8),

(6, 3)}

4.

{(3, 4), (5, 2), (5, 6),

(7, 3)}


A.

function

B.

not a function

Verified Answer :

AA
B) A
C)A
D) B
Reason I know this is because if we look at the x number in all of these, if 2 are the same (like 2,6 and 2,4) then its a non function.
But if none of the x =the same value its a function.
Same goes for B
C 
and now D, is a non function because out X's:
3
5
5
7
5 was repeated so it's a nonfunction.
Got it?

(I also just took this test XD)

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