Question

Which of the following relations is not a function?
A.
(-6, 4), (2, 3), (-5, 1), (8, 2)

B.
(-5, 4), (2, 2), (8, 1), (-6, 5)

C.
(8, 4), (-5, 2), (2, 1), (-6, 2)

D.
(2, 4), (-5, 2), (2, 1), (-6, 2)

Answer 1

@Loser66

Answer 2

oh thank god your hear help me

Answer 3

ok, look that the first element of the group, like A) you have the FIRST element of the pair is
-6,2,-5,8 right?

Answer 4

i guess so

Answer 5

I want you confirm that you understand what I did

Answer 6

oh ok now is see got it

Answer 7

and they are NOT similar to each other, right?
that is \(-6\neq 2\neq -5\neq 8\)

Answer 8

Hence, this group is a function --> not the answer.
Look at B)

Answer 9

is B a function?

Answer 10

The first elements of this group are -5,2,8,-6 . They are all different to each other, right?

Answer 11

yes

Answer 12

Hence, it is a function also --> B is NOT the answer.
Now, your turn, look at C and D, which one is NOT a function?