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*Relegated100.0*Average seed
Brescia 1 Catania 2 +5.1
-0.2
Lecce 2 Napoli 1 +2.4
-0.1
Cagliari 0 Cesena 2 +2.0
Genoa 2 Sampdoria 1 -1.2
+0.0
Week of 5/22None
Points
Chance Will Win Championship