OpenStudy (anonymous):

Which of the following does not represent a function? x 1 3 5 7 y 7 11 15 11 x −4 −2 0 2 y 3 −1 −5 −9 x −4 −3 −2 −1 y −32 −18 −8 −2 x −3 2 6 2 y 0 1 5 4

OpenStudy (angela210793):

x 1 3 5 7 y 7 11 15 11

OpenStudy (angela210793):

the 1st one doesn't

OpenStudy (anonymous):

Because function assigns exactly one output to each input.