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
Deportivo 0 Getafe 2 -29.9
+1.1
Granada 3 Las Palmas 2 +13.0
-0.2
Sporting Gijón 2 Eibar 0 +4.3
-0.1
Espanyol 1 Sevilla 0 +0.6
-0.1
Atlético Madrid 1 Rayo Vallecano 0 -0.6
+0.0
Málaga 3 Levante 1 -0.3
+0.0
Week of 5/13None
Week of 5/15100.0*Segunda Division100.0*Average seed
Real Betis 2 Getafe 1 +26.2
-0.4
Rayo Vallecano 3 Levante 1 +13.8
-0.2
Sporting Gijón 2 Villarreal 0 +13.8
-0.4
Points
Chance Will Win Championship