How are these numbers calculated?

Big Games

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

Week of 11/20100.0*Serie C100.0*Average seed
Vila Nova 1 Oeste 1 +6.0
-0.4
Sao Bento 4 Londrina 1 -0.4
-0.2
Week of 11/24None
Week of 11/29100.0*Serie C100.0*Average seed
Cuiaba 1 Vila Nova 2 +0.8
America-MG 1 Sao Bento 2 -0.3
Oeste 1 Criciuma 2 -0.3
Londrina 2 Guarani 0 -0.3
Points
Chance Will Win Championship