How are these numbers calculated?

Big Games

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

Week of 5/8100.0*Average seed
Cagliari 0 Cesena 2 -0.9
Genoa 2 Sampdoria 1 -0.2
Bologna 0 Parma 0 +0.1
Brescia 1 Catania 2 -0.1
Week of 5/22100.0*Average seed
Cagliari 1 Parma 1 -1.1
Bologna 0 Bari 4 +0.5
Palermo 1 Chievo 3 -0.4
Genoa 3 Cesena 2 +0.2
Inter 3 Catania 1 +0.1
Points
Chance Will Win Championship