Question

Which of the following relations is a function?

Answer 1

I think its the last one.

Answer 2

it is the first one. to be a function, no x values (domain) can be repeated.

Answer 3

do you understand why it is the first one and not the last one now?

Answer 4

Um no i dont could you help me with another?

Answer 5

sure c:

Answer 6

Which of the following relations is a function?


A.
{ (2, 6), (3, 9), (4, 2), (3, 6) }
B.
{ (2, 8), (3, 6), (2, 4), (0, 2) }
C.
{ (3, -2), (4, 7), (-2, 5), (-4, 5) }
D.
{ (4, 7), (-2, 5), (1, 3), (-2, 1) }

Answer 7

okay so you know that the first number in the ordered pair is the x value and the second is the y value. for example, (2,6). the 2 is the x value, the 6 is the y value. correct?

Answer 8

in order to be a function, none of the x values can be repeated, or used more than once.

Answer 9

so what do you think it is?

Answer 10

C?

Answer 11

correct!

Answer 12

seems like you got it, need any more help?