Answer:
Yes. No graph paper.
Step-by-step explanation:
Let's say the 3 points are A, B, C.
If A, B and C lie on one line then 

Hence, they lie on one line.
You don't need to use a graph paper to prove it.
Answer:
Is it a map? To me that makes the most logical sense.
It's basically asking you how far away is each dot. The graph goes by six. Good luck
We will have the following:

So, the original quantity was approximately $183 293.75.
Irrational
i dont know how to explain this one, but its irrational