Question

Need Help Plz!!

Answer 1

A. Function
B. Not a function

1.
{(3, 7), (3, 6), (5, 4),
(4, 7)}

Answer 2

For functions like these (x,y), x=input and y=output.

Answer 3

The input cannot have more than one output.

Answer 4

Do you see an input with more than one output?

Answer 5

(3,7), (3,6) (5,4), (4,7). (x,y) x=input y=output.

Answer 6

I think this one is a function

Answer 7

If 2 x values are the same number, they are the same input.

Answer 8

The same input cannot have more than 1 y value.

Answer 9

(3,7) (3,6) have the same x (3)

Answer 10

Do they have the same output?

Answer 11

No

Answer 12

Correcto, and since the same x value does not have the same y value as each other, this is not a function.

Answer 13

if it was (3,6), (3,6), it would be a function.

Answer 14

Oh ok can u check 3 more?

Answer 15

Sure.

Answer 16

2.
{(1, 5), (3, 5), (4, 6),
(6, 4)}

Not a function

Answer 17

Why do you think it's not a function?

Answer 18

Out of curiosity.

Answer 19

Oh wait wait I think its a function I read it wrong

Answer 20

Why do you think it's a function?

Answer 21

Because they dont have the same in/out put

Answer 22

Well they dont have it more than once

Answer 23

Correct. Side note though.
2 different numbers can have the same output, and it'll still be a function. The same input just cant have 2 or more outputs.

Answer 24

But correcto, this is a function.

Answer 25

Like (3,7) and (9,7) This is a function.

Answer 26

3.
{(2, 3), (4, 2), (4, 6),
(5, 8)}

Not a function

Answer 27

I think because it doesnt look right on my graph

Answer 28

Correcto. Can you find another reason why it's not a function?

Answer 29

Because it kinda curves a lil at (4,2) and (4,3)

Answer 30

Okay, ignore the graph for a moment.

Answer 31

And look only at the numbers.

Answer 32

*the points

Answer 33

What can you tell about the points that were given to you?

Answer 34

(2,3), (4,2), (4,6) (5,8). Just by looking at these.

Answer 35

(4,2) and (4,6) have the same input

Answer 36

They have the same input which is okay, until you end up with different outputs.

Answer 37

Like (4,2), (4,2) would be okay, since they're the same point with the same input and output.

Answer 38

4.
{(0, 4), (3, 2), (4, 2),
(6, 5)}

Function because (3,2) and (4,2) have the same output

Answer 39

Correct, but just because two different points have the same output, doesn't make it a function. For an example

(1,2) (3,4) (5,6) (8,10) is a function, but no input have the same output.

Answer 40

Oh ok thx u were alot of help! (:

Answer 41

Yup, no problem? Anything else you need help with?

Answer 42

Yes theres a question with graphs and im not sure on it

Answer 43

I'll be able to help you I think. Lol

Answer 44

Determine which relation is a function.

A.
Option D:
http://static.k12.com/calms_media/media/243000_243500/243033/1/07d0ffef1f4e6f4dfc7e2b0a6b695877fa43eaf8/VHS_ALG_S2_01_L203_L303_LQ_3D.gif

B.
Option B:
http://static.k12.com/calms_media/media/243000_243500/243031/1/94ac2108bcc0ae61962be36204df63047b8127d6/VHS_ALG_S2_01_L203_L303_LQ_3B.gif

C.
Option A:
http://static.k12.com/calms_media/media/243000_243500/243030/1/9d7da95c78918ed75d524e4f6b201e4bd131428e/VHS_ALG_S2_01_L203_L303_LQ_3A.gif

D.
Option C:
http://static.k12.com/calms_media/media/243000_243500/243032/1/374682ee8625ec2ab7a388df8263fac6f38c3313/VHS_ALG_S2_01_L203_L303_LQ_3C.gif

Answer 45

My sister said b but im not sure

Answer 46

Okay
determining graph functions is a whole lot easier than the other thing.

Answer 47

You can perform this thing called a Vertical Line test.

Answer 48

You just pick a point on the line, and draw a line up and down.
If the line touches any other part of your graph other that the part of the graph you drew it on first, then it is NOT a function.

Answer 49

Oh so C.?

Answer 50

If you draw a vertical line up and down on part C from the center of it, it will touch 2 parts of it. Therefore C is not a function.

Answer 51

Ok for sure not A now im thinking D

Answer 52

Why d?

Answer 53

Remember, if you draw a vertical line on the graph, and your vertical line touches the graph at 2 different parts, it is not a function.

Answer 54

The piont is on the side of the circle A is obviously not a function

Answer 55

What do you think the answer is?

Answer 56

D

Answer 57

Okay, so ignore the points that the question already placed on D.
Place a point somewhere else along the line of D.

Answer 58

Wherever you place that point, if the vertical line touches 2 different parts of the graph, it's not a function.

Answer 59

So the answer would be A??

Answer 60

nu

Answer 61

It would be B

Answer 62

No matter where you place a vertical line at along B, it will not touch at 2 different parts.

Answer 63

So I was right the very first time?

Answer 64

Mhm. I thought you said ur sister said the answer.

Answer 65

I was just showing you the work and reasoning behind it.

Answer 66

Well yea my sister did answer it

Answer 67

If u dont mind me asking how old r u?

Answer 68

15

Answer 69

Oh ur really smart :P

Answer 70

Thanks, lol.

Answer 71

Well I gtg byye

Answer 72

Yup, hope I helped some!

Answer 73

Yea alot