PLEASE HELP ANSWER FUNCTION AND RELATION

There are ~20 problems with ~80 parts to the problem.

Exactly where are you stuck? If cannot respond objectively, we would have to start with defining "definitions"! That would take quite a bit of time. To save time you may want to start sharing your work.
 
These questions are primarily about "function" and "relation".

What definitions of "function" and "relation" were you given?
 
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