Answer:
A relation is just a set of ordered pairs. There is absolutely nothing special at all about the numbers that are in a relation. In other words, any bunch of numbers is a relation so long as these numbers come in pairs.
In mathematics, what distinguishes a function from a relation is that each x value in a function has one and only ONE y-value.
If you post some of the problems you don't understand and ask that whoever answers them explains how they did it, it will hopefully help more. Good luck :)
