How are these numbers calculated?

Big Games

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

Week of 11/21100.0*Serie B100.0*Average seed
Coritiba 1 Santos 0 +2.5
-0.1
Fluminense 3 Avai 1 -2.0
+0.1
Atletico-MG 2 Goias 2 +1.1
+0.0
Joinville 1 Vasco da Gama 2 +0.8
-0.1
Week of 11/28100.0*Serie B100.0*Average seed
Chapecoense 1 Goias 3 -9.4
+0.6
Palmeiras 0 Coritiba 2 +1.2
Sao Paulo 3 Figueirense 2 -1.1
Vasco da Gama 1 Santos 0 +0.8
-0.2
Avai 1 Ponte Preta 0 +0.8
-0.2
Cruzeiro 3 Joinville 0 +0.0
Week of 12/6100.0*Serie B100.0*Average seed
Corinthians 1 Avai 1 Yes
-0.2
Figueirense 1 Fluminense 0 Yes
-0.2
Goias 0 Sao Paulo 1 Yes
-0.5
Coritiba 0 Vasco da Gama 0 -3.6
+0.1
Points
Chance Will Win Championship