How are these numbers calculated?

Big Games

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

Week of 4/29100.0*Relegated100.0*Average seed
NAC 3 Heerenveen 0 +15.6
-0.3
VVV 1 Roda 4 +9.9
-0.3
Feyenoord 3 Sparta 1 +5.5
-0.2
Zwolle 0 Willem II 1 +1.8
-0.1
Week of 5/6100.0*Relegated100.0*Average seed
Twente 1 NAC 1 +7.5
-0.1
Sparta 2 Heracles 5 +7.5
-0.5
Roda 2 ADO 3 -4.7
+0.3
Points
Chance Will Win Championship