Question 95507
Domain and Range on your problem are both "all Real Numbers" because there
is nothing in the rule of the function that restricts x or y.
----------------
What does restriction look like?
Example: y = 3/(x-2) ; x cannot be 2; domain is : all Real except x=2
-----------
Example: y = sqrt(x+3): x+3 must be >=0; x must be >=-3 and that is the domain.
-------------
Example: y = log (x-2): x-2 must be >=0; x must be >=2 and that is the domain
---------------
So, check the denominators; check even-root expressions; check log expressions
when looking for restrictions in the domain.  If none of these is present the
domain is "all Real number".
-------------------
The Range is something else:
Example: y= x^2 + 4
Since x^2 is always >= 0 , x^2+4 is always >=4 so the Range is >=4.
======================
Hope these examples help.
General Rule: Assume the domain is unrestricted unless you can see a reason
to restrict it.
==================
Cheers,
Stan H.