How are these numbers calculated?

Big Games

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

Week of 11/23100.0*Chance in playoffs100.0*Average seed
Graham 98 Uncle Rodney 111 -8.2
-0.7
Nonnie 41 Aunt Dar 100 +3.8
Aunt Sandy 88 Uncle Dave 59 +2.1
+0.2
Kara 53 Poppa 95 +0.7
+0.2
Isaac 75 Jake 86 -0.2
Spencer 92 Uncle Scott 37 -0.1
Week of 11/30100.0*Chance in playoffs100.0*Average seed
Graham 138 Aunt Sandy 113 +10.4
+0.5
Spencer 106 Uncle Dave 129 -3.5
-0.2
Isaac 48 Poppa 106 -0.6
Nonnie 86 Jake 93 -0.6
Kara 106 Uncle Scott 93 -0.5
-0.2
If winner is:HomeAway
Week of 12/7100.0*Chance in playoffs100.0*Average seed
Kara vs Uncle DaveIn-4.2
Aunt Dar vs JakeIn-4.2
Graham vs SpencerIn-4.2
+0.5-0.5

What If

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

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs123456789101112Count
81-0In833589,641,083
70-191.7%583389,644,845
Total:95.8%4175817419,285,928
Games Above .500
Chance Will Make Playoffs