Hello,
To solve this problem, you first must know that the domain are consisted of x-values, and the range is consisted of y-values.
Here is a random relation example:
(3,2), (8,9), (4,5)
Domain: {3, 4, 8}
Range: {2, 5, 9}
Note that the numbers must be put in order.
I hope my examples of domain and range can help you figure out your problem.
Have a great day,
iChameleon