Question

just one quick question i will fan and medal

Answer 1

If it is a function then every x cannot correspond to more than one y value

Answer 2

I don't understand @Bobo-i-bo

Answer 3

For example, in the first box, what is the corresponding y value to the x value of -8?

Answer 4

34

Answer 5

yup

Answer 6

so it IS a function, if given every x value, there is only one y value. For example, in that example I gave, x ONLY corresponds with the y value of 34, it does not corresponds with any other y value. Do you get that?

Answer 7

i think so

Answer 8

So in other words, it is NOT a function, if given one x value, there could be more than one possible y value.

Answer 9

so the answer is A?

Answer 10

why do you think it's A? Please give reasons to your answer :)

Answer 11

im not sure im still a bit confused on this...

Answer 12

which part of my explanation did you not understand? :)

Answer 13

how are -8 and 34 related?

Answer 14

hmm, it's a defined relation. So this is what a function is: Before hand, I have DECIDED that if I give you one number, you give me a certain number back. For example, if I could decide that, whenever I give you the number 2, you give me back the number 6 etc. Or I could decide before hand, that whenever I give you a number, you give me twice that number etc. So for the first box, whenever I give you the number -8, you give me back the number 34, if you give me the number -6, then I give you the number 32 etc. Hmmm, does that help you understand better?

Answer 15

So if in one of the boxes, I give you a number, and there could be more than one possible number to give back to me... that's not a function because with a function, I give you a number and you can always give me back ONE and only one number.

Answer 16

I think i get it now

Answer 17

I got D

Answer 18

Is that right? @Bobo-i-bo

Answer 19

Always give a reason please. Why do you think D? :)

Answer 20

The X values aren't supposed to repeat in a function right?

Answer 21

That is right, the X values aren't supposed to repeat

Answer 22

so then its B since -8 is in there twice

Answer 23

because for every x value there should be ONLY one y value

Answer 24

because for every x value there should be ONLY one y value

Answer 25

Yes, B is correct, since if I gave you the number -8, you wouldn't know whether to give back the number 34 or whether to give the number 40 back!

Answer 26

okay i think i understand it now, thank you for the help, sorry that took so long

Answer 27

np ^_^

Answer 28

just make sure you understand, that is most important!

Answer 29

have a nice day ^.^

Answer 30

You too