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
Sporting Gijón 2 Eibar 0 -18.8
+0.7
Granada 3 Las Palmas 2 +7.8
-0.2
Deportivo 0 Getafe 2 +3.6
-0.1
Atlético Madrid 1 Rayo Vallecano 0 -3.1
+0.1
Málaga 3 Levante 1 -1.2
+0.1
Espanyol 1 Sevilla 0 +0.7
Week of 5/13None
Week of 5/15100.0*Segunda Division100.0*Average seed
Sporting Gijón 2 Villarreal 0 -32.8
+0.6
Real Betis 2 Getafe 1 -23.7
+0.3
Rayo Vallecano 3 Levante 1 +5.7
-0.3
Points
Chance Will Win Championship