How are these numbers calculated?

Big Games

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

Week of 5/2100.0*Segunda Division100.0*Average seed
Atlético Madrid 1 Rayo Vallecano 0 +13.0
-0.7
Granada 3 Las Palmas 2 +4.5
-0.2
Deportivo 0 Getafe 2 +3.7
-0.1
Sporting Gijón 2 Eibar 0 +3.7
-0.1
Málaga 3 Levante 1 -2.4
+0.1
Espanyol 1 Sevilla 0 +0.5
-0.2
Week of 5/13None
Week of 5/15100.0*Segunda Division100.0*Average seed
Rayo Vallecano 3 Levante 1 -20.4
+1.0
Sporting Gijón 2 Villarreal 0 Yes
-0.3
Real Betis 2 Getafe 1 -14.6
+0.3
Points
Chance Will Win Championship