How are these numbers calculated?

Big Games

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

Week of 5/5100.0*Average seed
Rennes 1 Montpellier 0 +0.8
Toulouse 0 Caen 1 +0.2
Guingamp 4 Dijon 0 -0.2
Lille 0 Metz 2 +0.2
Lyon 3 Nantes 2 +0.1
Lorient 1 Angers 1 +0.0
Week of 5/13100.0*Average seed
Caen 0 Rennes 1 +0.6
Metz 1 Toulouse 1 +0.1
Monaco 4 Lille 0 +0.0
Nantes 4 Guingamp 1 -0.0
Week of 5/17100.0*Average seed
Rennes 2 Monaco 3 -0.4
Nancy 3 Saint-Étienne 1 +0.3
Guingamp 1 Metz 0 -0.2
Lille 3 Nantes 0 +0.2
Monaco 2 Saint-Étienne 0 +0.0
Points
Chance Will Win Championship