Question

Would appreciate it :)
Which relation does not represent a function?
Choose one answer.
a. (-4, 2), (1, 5), (-2, 0), (1, 6)
b. (-5, 3), (-3, 1), (0, -4), (3, -6)
c. (2, 0), (4, 6), (6, 8), (10, 6)
d. (-3, 6), (-1, 1), (0, 1), (3, 7)

Answer 1

a function is a relationship where for each value of x there is 1 and only 1 value of y

Answer 2

Appreciate
it, still a little befuddled.

Answer 3

are you sure your answer choices are all correctly written?

Answer 4

Absolutely! a. (-4, 2), (1, 5), (-2, 0), (1, 6)
b. (-5, 3), (-3, 1), (0, -4), (3, -6)
c. (2, 0), (4, 6), (6, 8), (10, 6)
d. (-3, 6), (-1, 1), (0, 1), (3, 7)

Answer 5

oh, sorry, I overlooked something, never mind. there's a correct answer there.

Answer 6

tired eyes :-)

Answer 7

I just can't find a solution :S and it's okay happens normally lol

Answer 8

notice how each x value matches up with only 1 y value?

Answer 9

well, look at each answer choice. do any of them have the same x value in two or more points?

Answer 10

Yes I do !

Answer 11

A has a dupiclate x value in there.

Answer 12

making a table like @Jhannybean is doing, or plotting each point is a good way to spot that...

Answer 13

and A is correct.

Answer 14

Wow thank you! THIS WAS HELPFUL!

Answer 15

@Jhannybean you made a large effort too! I appreciate both of you. :)

Answer 16

That is clear as day now that I see how it is done :O

Answer 17

Awesome :)

Answer 18

if you have a graph of the function, and there's a spot where you can draw a vertical line and have it cross the function more than once, that's an example of something that is not a function. for example: