How are these numbers calculated?

Big Games

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

Week of 11/22100.0*Serie B100.0*Average seed
Coritiba 2 Palmeiras 0 +18.6
-0.9
Figueirense 2 Vitoria 0 -4.4
+0.1
Chapecoense 2 Botafogo 0 +3.2
-0.2
Bahia 1 Atletico-PR 2 -0.9
Cruzeiro 2 Goias 1 +0.0
Week of 11/29100.0*Serie B100.0*Average seed
Flamengo 4 Vitoria 0 -12.6
+0.2
Internacional 3 Palmeiras 1 +10.7
-0.4
Bahia 1 Gremio 0 +6.8
-0.1
Santos 2 Botafogo 0 -1.7
+0.0
Atletico-MG 1 Coritiba 2 -0.1
Chapecoense 1 Cruzeiro 1 -0.1
Week of 12/6100.0*Serie B100.0*Average seed
Vitoria 0 Santos 1 -17.5
+0.2
Coritiba 3 Bahia 2 -9.8
+0.1
Palmeiras 1 Atletico-PR 1 +0.0
Points
Chance Will Win Championship