How are these numbers calculated?

Big Games

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

Week of 4/19100.0*Relegated to ProD2100.0*Average seed
Perpignan 31 Toulon 46 -5.6
+0.2
Oyonnax 19 Toulouse 19 -4.5
+0.2
Grenoble 21 Bayonne 21 -4.3
-0.3
Stade Français 37 Bordeaux Begles 23 -0.0
Week of 5/3100.0*Relegated to ProD2100.0*Average seed
Brive 19 Oyonnax 17 No
+0.2
Clermont 25 Perpignan 22 No
+0.1
Bayonne 23 Castres 13 +1.9
-0.3
Toulouse 38 Grenoble 8 +0.8
-0.3
Games Above .500
Chance Will Make Playoffs