Question

Consider the following relation: {(1,12), (3,8), (3,11), (6,9), (7,11)} Which ordered pair could be removed so that the relation is a function.

Answer 1

Either (3,8) or (3,11) should be removed

Explanation:

Because a function can only have one point per x-value, there cannot be any repeating x-values in ordered pairs the function.

Therefore, because the ordered pairs (3,8) and (3,11) both share "3" as their x-value, one of them has to be removed from the list of ordered pairs to make the relation a function.