This simply means that the function is not defined at the point x=-3. So if you're asked what is f(-3) just answer it doesn't exist or it is not defined.
my teacher for our first homework assignment gave us half answers, but i cant get the correct answer for this:
when you plug in -3 is equal to what?
my math teacher says 2 is the answer, but i always get
is my math teacher wrong? or what am i doing incorrectly?