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
Feyenoord 3 Sparta 1 +19.6
-0.6
NAC 3 Heerenveen 0 +12.5
-0.2
VVV 1 Roda 4 +5.7
-0.1
Zwolle 0 Willem II 1 +2.0
-0.1
Week of 5/6100.0*Relegated100.0*Average seed
Sparta 2 Heracles 5 +7.2
-0.5
Twente 1 NAC 1 +7.2
-0.1
Roda 2 ADO 3 -4.5
+0.3
Points
Chance Will Win Championship