How are these numbers calculated?

Big Games

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

Week of 11/15100.0*Série C100.0*Average seed
América-RN 2 Icasa 0 +22.6
-0.9
Bragantino 2 Santa Cruz 1 +6.2
-0.2
Week of 11/21100.0*Série C100.0*Average seed
Vasco da Gama 1 Icasa 1 Yes
-0.2
América-RN 1 Náutico 0 +2.4
-0.2
Boa Esporte 1 Oeste 0 -1.4
Bragantino 1 Paraná 1 -1.3
Week of 11/29None
Points
Chance Will Win Championship