Which of the following does not represent a function?

Answer

x 4 5 6 8 10

y 4 - 4 12 - 8 6

x - 10 1 3 8 10

y - 2 2 7 8 10

x 5 10 10 12 18

y 1 4 22 5 4

x - 12 - 5 11 14 17

y - 5 - 2 - 2 8 34

X 5 10 10 12 18

y 1 4 22 5 4

This does not represent a function because for x = 10, y = 4 and 22 which is not consistent with the definition of a function which states that for any input, there is a unique output.