Reflexsive A person watches as much television as himself.
Symettric If a person watches as much television as another person then the other person watches as much television as the first person.
Transitive If a person watches as much television as a second person and that second person watches as much as a third person then the first person has to watch as much television as the third person.
Now you create equivalence classes. You can have as many equivalence classes as you want. You can have all people watching 1 hour so you have 1 equivalence class of 5000 people. Or you can have equivalence classes of 1 each. Every person watches a different program (unless are told to use pigeonhole principle if there is a limit).