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
Aunt Sandy 88 Uncle Dave 59 +3.5
+0.2
Graham 98 Uncle Rodney 111 -2.6
-0.3
Nonnie 41 Aunt Dar 100 +2.5
+0.0
Isaac 75 Jake 86 +0.9
Kara 53 Poppa 95 +0.4
+0.2
Week of 11/30100.0*Chance in playoffs100.0*Average seed
Spencer 106 Uncle Dave 129 -3.4
-0.3
Graham 138 Aunt Sandy 113 +2.5
+0.1
Nonnie 86 Jake 93 +0.4
Isaac 48 Poppa 106 -0.1
Kara 106 Uncle Scott 93 -0.1
If winner is:HomeAway
Week of 12/7100.0*Chance in playoffs100.0*Average seed
Aunt Dar vs JakeIn-5.5
Kara vs Uncle DaveIn-5.5
+0.2-0.3
Graham vs SpencerIn-1.2
+0.5-0.2

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
81-0In4276919,021,627
70-195.8%6927449,127,373
Total:97.0%186920368,149,000
Games Above .500
Chance Will Make Playoffs