Question

Is the following relation a function?

two ovals, one labeled x and the other labeled y. The 2 in the x oval is pointing to the -1 the y oval, the 4 in x is pointing to 0 in y, 6 in x pointing to -3 and 0 in y, and 8 in x pointing to -2 in y

Yes
No

Answer 1

no - because the 6 maps on to -3 and 0

- a one-to-many relation is not a function