Here's the question you clicked on:
davisgurl101
Which of the following does not represent a function? x −12 −5 11 14 17 y −5 −2 −2 8 34 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 4 5 6 8 10 y 4 −4 12 −8 6
a function, or mapping from x to y, must have unique x's
i dont under stand
"Unique" means no repeats
in a function.. for every value of x there must be a unique value of y so if for the same value of x we have 2 or more values of y it is not a function so here in the third choice we have two y-values for x=10.. so it is not a function