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
Mjøndalen 1 Sarpsborg 3 +7.8
-0.3
Brann 0 Molde 1 -2.3
+0.2
Tromsø 0 Stabæk 0 -1.5
+0.0
Odd 1 Vålerenga 2 -0.3
Haugesund 1 Sandefjord 2 +0.3
Week of 12/5100.0*OBOS-ligaen100.0*Average seed
Vålerenga 2 Mjøndalen 0 +6.5
-0.4
Stabæk 1 Rosenborg 3 -6.4
+0.2
Bodø/Glimt 2 Brann 2 -0.6
+0.0
Week of 12/12100.0*OBOS-ligaen100.0*Average seed
Odd 3 Stabæk 1 -7.4
+0.2
Brann 2 Sarpsborg 1 Yes
-0.3
Mjøndalen 0 Bodø/Glimt 3 Yes
-0.5
Points
Chance Will Win Championship