Question

Which of the following does not represent a function?


x −3 0 1 −3 1
y 1 −1 −2 −3 −4

x 3 6 9 12 18
y 1 3 5 7 5

x −4 −2 0 2 4
y −5 −4 −3 −2 −1

x 6 5 4 3 1
y −6 −5 −4 −3 −1