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
Brasiliense 0 Nautico 1 +26.1
-1.0
America-RN 5 Guaratingueta 2 -5.6
+0.1
Bragantino 5 Vila Nova 1 -2.4
+0.0
Ipatinga 2 Duque de Caxias 0 +1.9
-0.2
Ponte Preta 0 Icasa 1 +0.8
-0.1
Sport Recife 1 Santo Andre 1 -0.2
Week of 11/19100.0*Serie C100.0*Average seed
Brasiliense 2 Ponte Preta 1 -24.8
+1.0
Portuguesa 2 Ipatinga 1 -3.8
+0.2
Guaratingueta 2 Figueirense 2 +2.8
-0.1
Nautico 4 Vila Nova 1 -2.4
+0.1
ASA 1 America-RN 2 +1.2
-0.2
Bahia 1 Santo Andre 2 +0.9
-0.2
Week of 11/26100.0*Serie C100.0*Average seed
America-RN 1 Brasiliense 2 -40.3
+1.6
Coritiba 2 Guaratingueta 3 +17.6
-0.4
Vila Nova 2 Sao Caetano 1 +9.8
-0.3
Santo Andre 1 Nautico 0 -0.3
Ipatinga 2 Icasa 2 +0.1
Points
Chance Will Win Championship