How are these numbers calculated?

Big Games

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

If winner is:HomeAway
Week of 10/2100.0*Chance in playoffs100.0*Average seed
Bay vs Pass Christian+13.3-17.8
+0.6-0.8
St. Stanislaus vs Vancleave+0.5-0.6
East Central vs Moss Point-0.4+0.5
If winner is:HomeAway
Week of 10/9100.0*Chance in playoffs100.0*Average seed
St. Stanislaus vs Bay-12.4+16.5
-0.6+0.8
Vancleave vs Moss Point-0.4+0.6
Pass Christian vs East Central+0.1-0.1

What If

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

100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs123456Count
55-0In100431,300,854
44-1In702912,095,663,728
33-299.8%939411104,033,887,839
22-352.7011413993,800,659,247
11-41.0129701,755,869,621
00-5Out100324,106,451
Total:68.9%18171716161512,441,487,740
Games Above .500
Chance Will Make Playoffs