How are these numbers calculated?

Big Games

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

Week of 5/1100.0*Average seed
AC Milan 1 Fiorentina 0 -0.5
Chievo 1 Napoli 2 +0.2
Parma 1 AS Roma 2 +0.2
Cagliari Calcio 2 Udinese 2 +0.1
Calcio Catania 1 Juventus 1 +0.0
Lazio 0 Inter Milan 2 +0.0
Week of 5/9100.0*Average seed
Fiorentina 1 AC Siena 1 -0.7
Juventus 2 Parma 3 -0.3
Genoa 1 AC Milan 0 -0.2
Udinese 3 Bari 3 -0.1
Inter Milan 4 Chievo 3 +0.1
AS Roma 2 Cagliari Calcio 1 +0.0
Bologna 1 Calcio Catania 1 +0.0
Week of 5/15100.0*Average seed
Bari 2 Fiorentina 0 -0.7
Chievo 0 AS Roma 2 +0.2
Parma 4 Livorno 1 -0.0
Points
Chance Will Win Championship