How are these numbers calculated?

Big Games

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

Week of 7/20100.0*Segunda Division B100.0*Average seed
Numancia 2 Tenerife 1 No
+0.7
Cadiz 0 Albacete 1 +15.8
-0.4
Lugo 2 Mirandes 1 +9.6
-0.4
Almeria 0 Malaga 0 +0.0
Week of 8/7None
Points
Chance Will Win Championship