How are these numbers calculated?

Lottery

We are out of the playoffs. Here are the big games and what ifs for draft seeds.
Although it might be more fun to go down swinging.

Big Games

Week of 9/25100.0*Lottery seed
Italy 23 Canada 18 -2.8
Ireland 44 Romania 10 +0.1
France 41 Canada 18 -0.1
Wales 23 Fiji 13 -0.1
Argentina 54 Georgia 9 +0.0
Scotland 39 United States 16 -0.0
Tonga 35 Namibia 21 +0.0
Week of 10/2100.0*Lottery seed
Canada 15 Romania 17 +0.2
Uruguay 15 Fiji 47 -0.2
South Africa 64 United States 0 -0.2
New Zealand 43 Georgia 10 -0.1
England 13 Australia 33 -0.1
Namibia 16 Georgia 17 +0.1
South Africa 34 Scotland 16 +0.1
Week of 10/9100.0*Lottery seed
Samoa 33 Scotland 36 -0.3
England 60 Uruguay 3 +0.3
New Zealand 47 Tonga 9 -0.3
If winner is:HomeTieAway
Italy vs Romania-2.7-1.3+3.1
United States vs Japan-0.2+0.2+0.2
Argentina vs Namibia-0.2-0.2+0.2

What If

100100100100100100100100100100100100100100100100100100100100
If finish:Chance will finish season at seed
TPW-OTLT1234567891011121314151617181920
81-0004357
60-001100
40-01006238
Total:19251402716
Points
Chance Will Make Playoffs