How are these numbers calculated?

Big Games

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

Week of 10/19100.0*Chance in playoffs100.0*Average seed
Oyster Bay 37 East Rockaway 70 +10.3
+0.6
Friends 7 Locust Valley 24 -4.4
-0.2
VSS 14 Malverne 32 -1.2
CSH 14 Clarke 22 -0.6
West Hempstead 35 Carle Place 13 -0.4
+0.1
Island Trees 14 Seaford 41 +0.3
Week of 10/26100.0*Chance in playoffs100.0*Average seed
Seaford 40 East Rockaway 8 -20.2
-0.7
West Hempstead 7 Locust Valley 40 -6.2
-0.2
Malverne 6 CSH 45 +2.1
+0.1
Carle Place 0 Island Trees 31 -1.3
Clarke 37 VSS 0 +1.2
Oyster Bay 0 Friends 38 -0.4
Week of 11/2100.0*Chance in playoffs100.0*Average seed
Locust Valley 0 Seaford 41 +1.6
East Rockaway 26 Island Trees 12 +1.6
+0.5
Friends 20 VSS 8 +1.6
Clarke 57 Oyster Bay 14 Out
Malverne 20 Carle Place 14 Out
Games Above .500
Chance Will Make Playoffs

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 10/19100.0*Lottery seed
Oyster Bay 37 East Rockaway 70 -1.4
Friends 7 Locust Valley 24 +0.3
VSS 14 Malverne 32 +0.1
CSH 14 Clarke 22 +0.1
Southampton 6 Mt. Sinai 35 -0.1
GSM 0 Hampton Bays 60 +0.1
West Hempstead 35 Carle Place 13 -0.1
Week of 10/26100.0*Lottery seed
Seaford 40 East Rockaway 8 +1.6
West Hempstead 7 Locust Valley 40 +0.4
Mt. Sinai 35 Hampton Bays 0 -0.1
Wyandanch 0 Babylon 37 +0.1
Clarke 37 VSS 0 +0.1
Week of 11/2100.0*Lottery seed
East Rockaway 26 Island Trees 12 -1.6
Port Jefferson 35 Southampton 0 +0.3
Malverne 20 Carle Place 14 +0.2
Glenn 40 Wyandanch 0 +0.2