Question

What is the domain and range for {(1,2), (2,3), (2,5), (1,6)}?

Answer 1

In the set of ordered pairs {(-2, 0), (0, 6), (2, 12), (4, 18)}, the Domain is the set of the first number in every pair (those are the x-coordinates): {1, 2}.

The Range is the set of the second number of all the pairs (those are the y-coordinates): {2, 3, 5, 6}.