Answer:
I believe C is the line of best fit because everything is spread out more evenly instead of some being spread out farther than others.
8-3(2)
8-5
=3
the answer should be 3 after plugging in the variables.
If I understand your question correctly then it's simple all you have to do is use the numbers in the place of the b and c so the question would be what is 8-7 which equals 1