How are these numbers calculated?

Big Games

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

Week of 4/13100.0*Relegated100.0*Average seed
Roda JC 4 VVV Venlo 1 +4.2
-0.2
Excelsior 1 AZ Alkmaar 1 -0.8
+0.0
Sparta 4 Heerenveen 2 +0.7
De Graafschap 1 FC Utrecht 1 +0.7
Willem II 3 Feyenoord 1 +0.5
-0.2
Heracles 0 NAC Breda 1 -0.4
PSV Eindhoven 1 Twente 1 -0.1
Week of 4/20100.0*Relegated100.0*Average seed
VVV Venlo 3 De Graafschap 0 -6.5
+0.3
Heerenveen 5 Excelsior 0 -1.3
+0.1
Points
Chance Will Win Championship