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 +19.9
-0.7
Grenoble 21 Bayonne 21 +4.0
+0.1
Oyonnax 19 Toulouse 19 -2.0
+0.1
Week of 5/3100.0*Relegated to ProD2100.0*Average seed
Clermont 25 Perpignan 22 +11.9
-0.4
Bayonne 23 Castres 13 +10.2
-0.2
Brive 19 Oyonnax 17 -10.1
+0.2
Toulouse 38 Grenoble 8 -0.3
+0.1
Games Above .500
Chance Will Make Playoffs