How are these numbers calculated?

Big Games

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

Week of 11/12100.0*Serie C100.0*Average seed
Bragantino 5 Vila Nova 1 +7.5
-1.0
Brasiliense 0 Nautico 1 -4.2
-0.0
America-RN 5 Guaratingueta 2 -3.5
+0.2
Ipatinga 2 Duque de Caxias 0 +1.9
Ponte Preta 0 Icasa 1 +0.7
-0.1
Sport Recife 1 Santo Andre 1 -0.2
Sao Caetano 0 America-MG 0 +0.0
Week of 11/19100.0*Serie C100.0*Average seed
Nautico 4 Vila Nova 1 +14.4
-0.8
Brasiliense 2 Ponte Preta 1 +5.6
Portuguesa 2 Ipatinga 1 -4.5
+0.1
ASA 1 America-RN 2 +3.4
-0.1
Guaratingueta 2 Figueirense 2 +1.9
-0.0
Sao Caetano 1 Duque de Caxias 0 -0.0
Week of 11/26100.0*Serie C100.0*Average seed
Vila Nova 2 Sao Caetano 1 No
+1.1
America-RN 1 Brasiliense 2 +6.2
-0.1
Coritiba 2 Guaratingueta 3 +5.7
-0.4
Ipatinga 2 Icasa 2 +0.1
Points
Chance Will Win Championship