How are these numbers calculated?

Big Games

How we did last week and who we should root for this week.   Explain

Week of 10/13100.0*Average seed
Miller Place 21 SWR 14 -0.6
Glenn 45 Port Jefferson 8 +0.1
Babylon 46 Center Moriches 14 -0.0
Mercy 14 Hampton Bays 7 -0.0
Week of 10/20100.0*Average seed
SWR 26 Babylon 29 -0.8
Port Jefferson 42 Southampton 13 -0.2
Miller Place 28 Mt. Sinai 14 -0.1
Mercy 6 BBP 41 +0.1
Center Moriches 48 Hampton Bays 0 -0.0
If winner is:HomeTieAway
Week of 10/27100.0*Average seed
Port Jefferson vs SWR-0.5+0.5+0.5
BBP vs Miller Place+0.1-0.1-0.1
Center Moriches vs Mercy-0.1+0.2+0.1
GSM vs Mt. Sinai-0.1-0.1+0.1

What If

Chances based on how well the SWR finish out the regular season.   Explain

100100100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-L-Tplayoffs1234567891011121314Count
5.5-6In1005,143,371*
50-1-0In1767175,137,757
Total:In5833810,281,128

* Row combines multiple less frequent records.

Games Above .500
Chance Will Make Playoffs