Question

Which relation is function?
A. (3,-2), (4,6), (-2,6), (3,1)
B. (-1,4), (3,2), (4,-2), (2,4)
C. (2,-7), (-8,2),(2,4), (-1,5)
D. (2,2), (-3,-4), ,(-3,1), (-2,1)

Answer 1

which of the relations above
have more than one ordered pair with the same x but different y

Answer 2

Like if I listed {(3,4),(3,6)}
this would not be a function
because this relation has more than one ordered pair with the same x but different y

Answer 3

{(3,4),(6,3)}
would be a function because there is not more than one ordered pair with the same x and different y

Answer 4

So look at the first relation {(3,-2),(4,6),(-2,6),(3,1)}
Do any two points (or more) have a common x?

Answer 5

yes (3,-2) , (3,1)

Answer 6

and they have a different y
so by what I said is this relation a function?

Answer 7

no it would not

Answer 8

no it isn't a function (very food)

Answer 9

good* (hungry I am I guess)

Answer 10

what about the 2nd one?

Answer 11

if you don't see a common x you don't have to worry then about the other part
if you don't see a common x, it is a function

Answer 12

B. does not have a common function

Answer 13

????

Answer 14

a common x ?
yes it doesn't have a common x
so it is a function?