Question

Determine which relation is a function.

A.
{(–3, 2), (–2, 3), (–1, 1), (0, 4), (0, 1)}

B.
{(–3, 3), (–2, 3), (–1, 1), (0, 4), (0, 1)}

C.
{(–3, 2), (–1, 3), (–1, 2), (0, 4), (1, 1)}

D.
{(–3, 2), (–2, 3), (–1, 2), (0, 4), (1, 1)}

Answer 1

If there are 2 x values with different y values then that isn't a function

Answer 2

Which one do you think is the answer?

Answer 3

I think it's C

Answer 4

Okay. Are there any repeating x values in any of the coordinates in letter C?

Answer 5

No

Answer 6

I mean yes

Answer 7

Now do the 2 x values with the same number have different y values?
If your answer is yes to this question, then it is not a function.

Answer 8

So it's B

Answer 9

they all have at least one that are the same

Answer 10

(–3, 3), (–2, 3), (–1, 1), (0, 4), (0, 1)
These are the coordinates for letter B.
Are there any repeating x values?

Answer 11

Yes

Answer 12

Do those x values have different y values?

Answer 13

yes

Answer 14

Good job. This means that it is not a function

Answer 15

So it's not B and not C

Answer 16

correct

Answer 17

So how would I get the answer all of the have one that's the same thing

Answer 18

You need to look through the choices and find the one that has no repeating x values

Answer 19

(–3, 2), (–2, 3), (–1, 2), (0, 4), (1, 1)
Lets look at this one. These are from letter D.
Are there any repeating x values?

Answer 20

I did all of them have one as the same as the other A and B both have (0,1) and C and D both have (1,1) and they all have (0,4)

Answer 21

(–1, 2), (1, 1)
These are from letter D. Yes, one of these coordinates is (1,1). But, are the x values in these two the same?

Answer 22

No

Answer 23

Good. Then that means that this one is a function

Answer 24

what about A?

Answer 25

(–3, 2), (–2, 3), (–1, 1), (0, 4), (0, 1)
Here is letter A.
Are there any repeating x values?

Answer 26

yes

Answer 27

Okay. Do those two coordinates have different y values?

Answer 28

No

Answer 29

(0, 4), (0, 1)
These are the two coordinates with the same x value.
Do these two have different y values?

Answer 30

No

Answer 31

Lets identify the x and y values of these two coordinates.

(0, 4)
What is the x value? And what is the y value?

Answer 32

Of (0,4)?

Answer 33

yes

Answer 34

The coordinate setup is like this (x,y)

Answer 35

Sorry I had to go to the bathroom

Answer 36

It's okay

Answer 37

So could you explain to find the value of X and Y

Answer 38

Okay. Coordinates are set up as follows:
\[(x,y)\]
I'll do an example from letter D.
(–2, 3)
According to the setup above the x value equals -2.
After finding the x value, the remaining one is the y value. So the y value of this would be 3.

Answer 39

Oh ok that makes more sense so the answer is D?

Answer 40

yes

Answer 41

Thank you so much could you help with 4 more?

Answer 42

your welcome and sure

Answer 43

do you want me to start a new one

Answer 44

Only if you want to

Answer 45

Ok I'll tag you