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
America-RN 5 Guaratingueta 2 +21.4
-1.0
Ipatinga 2 Duque de Caxias 0 +2.2
-0.1
Brasiliense 0 Nautico 1 -2.0
-0.0
Bragantino 5 Vila Nova 1 -1.8
+0.1
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 +12.8
-0.2
Guaratingueta 2 Figueirense 2 -8.4
+0.1
ASA 1 America-RN 2 +6.7
-0.1
Portuguesa 2 Ipatinga 1 -6.2
+0.1
Nautico 4 Vila Nova 1 -3.6
+0.1
Bahia 1 Santo Andre 2 +1.2
-0.1
Week of 11/26100.0*Serie C100.0*Average seed
Coritiba 2 Guaratingueta 3 No
+1.0
Vila Nova 2 Sao Caetano 1 +29.0
-0.4
America-RN 1 Brasiliense 2 +5.1
-0.2
Points
Chance Will Win Championship