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
Grenoble 21 Bayonne 21 -12.6
+0.3
Perpignan 31 Toulon 46 -8.2
+0.2
Oyonnax 19 Toulouse 19 -0.6
+0.1
Week of 5/3100.0*Relegated to ProD2100.0*Average seed
Bayonne 23 Castres 13 -20.0
+0.8
Brive 19 Oyonnax 17 -4.2
+0.2
Clermont 25 Perpignan 22 -3.5
+0.1
Toulouse 38 Grenoble 8 -0.3
+0.1
Games Above .500
Chance Will Make Playoffs