Question

http://s14.postimg.org/nwatmhfr5/sdgsbh.png

Answer 1

Indert the data here:
http://www.alcula.com/calculators/statistics/linear-regression/

It'll give you a regrssion line equation

Answer 2

I can't use that it says 5 to 300. I have 3 and 2 :F

Answer 3

What?
you just do
1,3
2,0
3,4
4,9
5,15
6,18
7,14

Copy and paste those numbers to get it
This is what i got:
http://prntscr.com/4rm7m9
Of course you round it though
So looking at that and rounding it, the answer would be C

Answer 4

Thanks :)