Question

Which relation is a function?

A.
x −2 −2 0 1 8
y 3 6 0 0 9


B.
x 3 5 7 14 14
y −9 5 −9 1 2


C.
x −3 4 5 9 12
y 1 −2 −2 0 7


D.
x −7 −5 6 8 8
y −3 8 1 1 −9

plrase help due today

Answer 1

first things first do you have a clue what a function is

Answer 2

A function is a relation where each value of \(x\) has only 1 associated value of \(y\). If \(x\) repeats, it must always have the same value of \(y\) with each repeat.

Answer 3

yea i know that

Answer 4

help @AlexandervonHumboldt2

Answer 5

can you help me

Answer 6

So, look at the data. That's all you need to do.

Answer 7

Look at A:

x −2 −2 0 1 8
y 3 6 0 0 9

Does the same value of \(x\) appear more than once?

Answer 8

i think the anser is maybe d

Answer 9

you have to think

Answer 10

let's just work through it on all 4, and you'll understand it.

So, looking at A, did the same value of \(x\) appear more than once?

Answer 11

so does the same value of x come into a twice

Answer 12

sry

Answer 13

said the same thing

Answer 14

i have already tried to solve it but i could not figer out what the answer would be i think it is d but not sure

Answer 15

so lets go through it

Answer 16

kk

Answer 17

Come on, look at this table.

x −2 −2 0 1 8
y 3 6 0 0 9

Does the same value of \(x\) appear more than once? Yes or no?

Answer 18

yes

Answer 19

???

Answer 20

Okay. Do those both have the same value of \(y\) underneath them?

Answer 21

yes???

Answer 22

perfect

Answer 23

Do you know how to read a table? What is the first entry in the row for x?

Answer 24

-2

Answer 25

@raceter444 that's not perfect, that's incorrect :-(

Answer 26

and the first entry in the row for \(y\)? what is that?

Answer 27

3

Answer 28

that's correct. Now let's do the same thing, except give me the second entry in the row for \(x\) and the second entry in the row for \(y\)

Answer 29

ill get back to the point

Answer 30

im the fun cop u are the corect cop k

Answer 31

o,6

Answer 32

0 is x and 6 is y

Answer 33

no, that's the 3rd entry.