Question

Which of the following is an example of a function?Answer

{(-1, 0), (-1, 3), (3, 9), (5, 10)}

{(1, 3), (2, 5), (3, 8), (4, 10)}

{(4, 6), (5, 9), (4, 7)}

{(0, 2), (0, 3), (1, 5), (4, 5)}

Answer 1

@ghazi

Answer 2

@petewe

Answer 3

@mathgirl73

Answer 4

The same x can not have more than one y

Answer 5

A than

Answer 6

yea totally

Answer 7

@petewe yeah? thanks.

Answer 8

(x,y)

For example let's use A

{(-1, 0), (-1, 3), (3, 9), (5, 10)}

the first one has x=-1 and y=0
the second one has x=-1 and y=3

so that's not a function.

Answer 9

@RyanL. A is the answer I got it already but thanks.

Answer 10

i disagree

Answer 11

Why because x=-1 has more than one values y=0 and y=3

A is not the answer.

Answer 12

My fault I thought it was from least to great... xp

Answer 13

Yeah A is wrong.

Answer 14

i disagree

Answer 15

no didnt you read what I said?

Answer 16

Disagreeing without proof or evidence is as reliable as wikipedia :P

Answer 17

C looks like a function.

Answer 18

i disagree

Answer 19

Can you tell me why c is a function?

Answer 20

cause their postive

Answer 21

No I said that a function has a distinct only one y value for every x value.

Answer 22

no no no

Answer 23

@richyw

Answer 24

can you prove that please.

Answer 25

Can you at least try to make an educated guess with the information I gave you @ramirokool

Answer 26

Okay than D.

Answer 27

That is harsh.

Answer 28

@AccessDenied help?

Answer 29

why was i issued a warning?

Answer 30

@AccessDenied

Answer 31

K.

Answer 32

A function is simply defined as a relation where each input has exactly one output.
So, if we have any situations where one input/x-value is related to two or more y-values, we have no function.

Answer 33

Oh, alright.

Answer 34

So, in terms of points, we cannot have a situation like: (x, a), (x, b) appear where a=/=b.
We just want the relation that has none of those issues^. :)

Answer 35

Thanks that really does, ahh I hate math But I gotta do it.

Answer 36

I really wished I knew which of the options are/./.

Answer 37

You're welcome. :)

Answer 38

@AccessDenied B?

Answer 39

educated guess

Answer 40

Yes, B is correct.
Note how it is the only one without points like (1, 1) and (1, 2), which means "if i have x=1, which y does my function give me?"

Answer 41

I understand thanks so much! (: