How are these numbers calculated?

Big Games

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

Week of 10/24100.0*Serie B100.0*Average seed
Gremio 2 America-RN 1 +1.4
-0.2
America-MG 2 Atletico-PR 1 +0.6
-0.1
Santos 1 Parana 2 +0.6
-0.1
Ponte Preta 2 Bragantino 2 -0.3
America-RN 2 Santos 2 Yes
-0.0
Goias 2 Juventude 2 -0.1
Bragantino 1 Juventude 0 -0.1
Week of 10/31None
Week of 11/7None
Points
Chance Will Make Playoffs