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
Tromsø 0 Stabæk 0 No
-0.2
Odd 1 Vålerenga 2 -0.3
+0.2
Haugesund 1 Sandefjord 2 +0.1
-0.1
Brann 0 Molde 1 -0.1
Mjøndalen 1 Sarpsborg 3 -0.1
-0.1
Lillestrøm 4 Strømsgodset 1 +0.1
Week of 12/5100.0*OBOS-ligaen100.0*Average seed
Sarpsborg 0 Tromsø 1 +0.8
Sandefjord 3 Kristiansund 2 -0.2
Viking 3 Odd 1 +0.2
Week of 12/12100.0*OBOS-ligaen100.0*Average seed
Tromsø 0 Viking 2 -1.0
Haugesund 1 Molde 2 +0.3
Lillestrøm 2 Sandefjord 0 +0.3
Rosenborg 2 Strømsgodset 2 +0.0
Points
Chance Will Win Championship