I believe that it's (1,3)
(tip: with these problems, try to use desmos.com)
Answer:
Voted for what exactly? I could help you more if you had a more definitive question. Unfortunately, I cannot answer this for you.
Yes, -0.5 is an integer because it is a negative number. Any number that is positive or negative is an integer.
I think that the answer for that one is A
