If a relation is a function, how many y-values can each x-value have?
No.
Practice makes perfect
For a relation to be a function, each x-value can only be paired with one y-value, but one y-value can be paired with multiple x-values.
( 3, - 8), (- 9,1), ( 3, 2), (- 4,1), (- 11,- 2)
Examining the ordered pairs, we can see that there is at least one x-value with multiple y-values. Therefore, the relation is not a function.