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*La Liga100.0*Average seed
Elche 2 Oviedo 1 +22.9
+1.1
Santander 1 Rayo 2 -0.4
Numancia 2 Tenerife 1 +0.4
Las Palmas 5 Extremadura 1 -0.2
Lugo 2 Mirandes 1 +0.1
Week of 8/7100.0*La Liga100.0*Average seed
Deportivo 2 Fuenlabrada 1 Yes
+0.6
Points
Chance Will Win Championship