Question

Which relation is a function?


A.


{(1, 2), (1, 5), (1, –1), (1, 4)}


B.


{(7, 12), (1, –5), (3, –10), (2, –5)}


C.


{(8, –1), (2, –1), (3, 8), (2, 5}


D.


{(–3, 4), (–2, 5), (0, 9), (0, 12)}

Answer 1

the same inputs CANT map to different outputs

does A pass the criteria?

Answer 2

Yep

Answer 3

no it doesnt, 1 goes with 2
1 goes with 5
1 goes with -1
and 1 goes with 4

Answer 4

we can only have 1 "going" with one number

Answer 5

oh

Answer 6

so A is not a function

Answer 7

what about B?

Answer 8

I think its wrong too