How are these numbers calculated?

Big Games

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

Week of 11/14100.0*Serie C100.0*Average seed
America-RN 2 Icasa 0 +22.6
-0.9
Icasa 1 Parana 2 +19.4
-0.6
Bragantino 2 Santa Cruz 1 +6.2
-0.2
Vila Nova 0 Oeste 1 +6.0
-0.2
Oeste 2 Nautico 0 +5.1
-0.1
ABC 1 Ceara 0 +3.2
-0.1
Atletico-GO 1 Bragantino 0 -3.1
+0.1
Ponte Preta 2 America-RN 2 -1.4
+0.0
Week of 11/21100.0*Serie C100.0*Average seed
America-RN 1 Nautico 0 +2.4
-0.2
Bragantino 1 Parana 1 -1.3
Week of 11/29None
Points
Chance Will Win Championship