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
Willem II 3 Feyenoord 1 +2.6
-0.1
De Graafschap 1 FC Utrecht 1 -2.2
-0.0
Sparta 4 Heerenveen 2 +1.1
-0.3
Roda JC 4 VVV Venlo 1 -1.0
+0.0
Heracles 0 NAC Breda 1 -0.2
+0.2
Week of 4/20100.0*Relegated100.0*Average seed
VVV Venlo 3 De Graafschap 0 +1.3
-0.4
Ajax 5 Heracles 1 No
+0.1
Twente 2 Willem II 0 No
+0.1
AZ Alkmaar 1 Sparta 0 +0.0
Points
Chance Will Win Championship