If a relation is a function, how many y-values can an x-value have?
Yes, see solution.
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. Let's play close attention to the graph below.
We can see that the graph is a straight line. Also, no two points have the same x-value. This means that the graph represents a linear function. Therefore, it is a function.
