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
Genoa 2 Sampdoria 1 +0.5
Cagliari 0 Cesena 2 +0.2
Bologna 0 Parma 0 +0.1
Inter 3 Fiorentina 1 +0.0
Palermo 2 Bari 1 -0.0
Week of 5/22100.0*Average seed
Genoa 3 Cesena 2 +0.2
Brescia 2 Fiorentina 2 -0.2
Inter 3 Catania 1 +0.0
Points
Chance Will Win Championship