How are these numbers calculated?

Big Games

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

Week of 11/28100.0*OBOS-ligaen100.0*Average seed
Odd 1 Vålerenga 2 +3.7
-0.6
Tromsø 0 Stabæk 0 -0.9
+0.1
Mjøndalen 1 Sarpsborg 3 -0.3
Brann 0 Molde 1 -0.3
Haugesund 1 Sandefjord 2 +0.3
-0.1
Lillestrøm 4 Strømsgodset 1 +0.1
Week of 12/5100.0*OBOS-ligaen100.0*Average seed
Stabæk 1 Rosenborg 3 No
+0.1
Viking 3 Odd 1 +2.6
-0.5
Sarpsborg 0 Tromsø 1 -0.2
Sandefjord 3 Kristiansund 2 -0.1
Week of 12/12None
Points
Chance Will Win Championship