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
Sport Recife 1 Santo Andre 1 +2.8
-0.3
Bragantino 5 Vila Nova 1 -0.4
Ipatinga 2 Duque de Caxias 0 +0.3
-0.2
America-RN 5 Guaratingueta 2 -0.2
-0.2
Brasiliense 0 Nautico 1 +0.1
+0.1
Week of 11/19100.0*Serie C100.0*Average seed
Bahia 1 Santo Andre 2 -0.7
+0.6
Guaratingueta 2 Figueirense 2 Yes
Portuguesa 2 Ipatinga 1 -0.3
+0.1
Brasiliense 2 Ponte Preta 1 +0.2
-0.1
ASA 1 America-RN 2 +0.2
-0.2
Week of 11/26100.0*Serie C100.0*Average seed
Santo Andre 1 Nautico 0 +0.9
Ipatinga 2 Icasa 2 +0.4
Points
Chance Will Win Championship