Question

Which of the following is NOT a function?

(1,4), (3,5), (4,8), (6,9)
(2,4), (2,5), (3,8), (3,9)
(1,6), (2,6), (3,6), (4,6)
(12,43), (13,55), (14,88), (19,135)

Answer 1

to be a function can not have the value of x repeated
for example if I have (2,3) (2,5) is not a function

Answer 2

so it wouldnt be the second or third one.... Right??? It would be the last one..correct??

Answer 3

the question is which one is NOT a function ??

Answer 4

so if you see that the x shows the same number is already not a function

Answer 5

(CONFUSION)

Answer 6

the values of the "x" on the last one are {12,13,14, 19} the all different so that is a function

Answer 7

you have points as (x,y), just look at the values on position of x

Answer 8

Ok so it would be the second one because the value of x repeats so that would make it not a function.

Answer 9

correct, you got it

Answer 10

Thanks!!! ;)

Answer 11

yw :)