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*Serie B100.0*Average seed
Internacional 0 Coritiba 0 +5.4
-0.4
Vasco da Gama 2 Cruzeiro 1 +4.4
-0.2
Bahia 1 Portuguesa 0 +3.8
-0.1
Santos 1 Fluminense 0 -3.4
+0.1
Flamengo 1 Corinthians 0 +0.4
-0.1
Criciuma 1 Vitoria 1 -0.3
+0.0
Ponte Preta 1 Gremio 1 -0.2
+0.0
Week of 11/30100.0*Serie B100.0*Average seed
Coritiba 2 Botafogo 1 -35.9
+1.4
Vasco da Gama 2 Nautico 0 +6.6
-0.2
Criciuma 1 Sao Paulo 0 +4.3
-0.2
Cruzeiro 1 Bahia 2 +3.6
-0.1
Ponte Preta 0 Portuguesa 2 +2.4
-0.1
Fluminense 2 Atletico-MG 2 -2.2
+0.0
Corinthians 0 Internacional 0 +0.3
Week of 12/7100.0*Serie B100.0*Average seed
Sao Paulo 0 Coritiba 1 No
+2.2
Atletico-PR 5 Vasco da Gama 1 -16.8
+0.3
Bahia 1 Fluminense 2 +16.3
-0.2
Flamengo 1 Cruzeiro 1 -0.1
Botafogo 3 Criciuma 0 +0.1
Internacional 0 Ponte Preta 0 +0.1
Portuguesa 0 Gremio 0 -0.1
Points
Chance Will Win Championship