Question

Determine which relation is a function.

A.
{(–4, 3), (–2, 3), (–1, 2), (2, 5), (3, 2)}

B.
{(–4, 1), (–2, 3), (–2, 1), (–1, 5), (3, 2)}

C.
{(–4, 1), (–2, 3), (–1, 2), (3, 5), (3, 2)}

D.
{(–4, 1), (–2, 3), (–1, 1), (–1, 5), (3, 2)}

Answer 1

for which group of ordered pairs do you see that there is more than one ordered pairs with a common x value?

Answer 2

The groups that you name to the question I just asked will be relations who aren't functions.

Answer 3

they all have move than one x value

Answer 4

Common was the key word there

Answer 5

a

Answer 6

For example {(3,5),(2,5),(1,2),(3,-7)}
has two ordered pairs that have a common x
so this set I just gave as an example is not a function.
For example {(3,5),(2,5),(1,2),(4,-7)}
has no ordered pairs that have a common x
so this set I just gave as an example is a function.

Answer 7

-2 and 2

Answer 8

A has all the x's are different
so A is a function.

Answer 9

There were no common x's in A

Answer 10

I understand not as hard as I thought, Thank You!

Answer 11

B wouldn't work because you had (-2,3) and (-2,1)
C wouldn't work because you had (3,2) and (3,5)
D wouldn't work because you had (-1,1) and (-1,5)

Answer 12

yeah

Answer 13

Like each x can only have one y.

Answer 14

Ok cool