How are these numbers calculated?

Big Games

How we did yesterday and who we should root for today.   Explain

Thursday100.0*Serie B100.0*Average seed
Fluminense 2 Portuguesa 0 +23.5
-1.7
Guarani 2 Botafogo 0 -3.8
Parana 1 Gremio 1 +0.0
Sunday100.0*Serie B100.0*Average seed
Portuguesa 2 Bahia 4 +39.1
-1.6
Vitoria 4 Palmeiras 3 -13.8
+0.3
Paysandu 0 Internacional 2 +13.2
-0.2
Botafogo 0 Sao Paulo 1 -6.5
+0.2
Figueirense 2 Parana 2 +4.5
+0.0
Flamengo 2 Guarani 2 -0.1
Points
Chance Will Make Playoffs