Question

A function is _____ a relation.

always
sometimes
never

Answer 1

i think its always

Answer 2

For a relation to be a function, there must be only and exactly one y that corresponds to a given x. ... This is a function! There is only one arrow coming from each x; there is only one y for each x. It just so happens that it's always the same y for each x, but it is only that one y.