Consider this option (see the attached picture). Note, that every domain of the function is marked by green.
If it is possible check this solution in other sources.
Answer:
don't know don't know don't know don't know don't know don't know don't know
Step-by-step explanation:
don't know don't know don't know don't know don't know don't know don't know don't
Variables are represented by letters
Y is the only letter therefore 1 variable
(the x appears to be a multiplication sign)
hope this helps