How are these numbers calculated?

Big Games

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

Week of 11/18100.0*Average seed
Atletico-MG 2 Atletico-GO 2 +0.2
Portuguesa 2 Gremio 2 -0.1
Week of 11/25100.0*Average seed
Botafogo 2 Atletico-MG 3 -0.3
Figueirense 2 Gremio 4 +0.2
Ponte Preta 0 Sao Paulo 0 +0.0
Week of 12/1100.0*Average seed
Gremio 0 Inter 0 -0.3
Atletico-MG 3 Cruzeiro 2 -0.2
Points
Chance Will Win Championship