How are these numbers calculated?

Big Games

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

Week of 11/23100.0*Serie B100.0*Average seed
Ponte Preta 1 Gremio 1 +1.5
-0.1
Santos 1 Fluminense 0 -0.3
Vasco da Gama 2 Cruzeiro 1 +0.3
-0.1
Criciuma 1 Vitoria 1 -0.2
Week of 11/30100.0*Serie B100.0*Average seed
Fluminense 2 Atletico-MG 2 Yes
Ponte Preta 0 Portuguesa 2 -0.1
Week of 12/7None
Points
Chance Will Win Championship