How are these numbers calculated?

Big Games

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

Week of 5/7100.0*UEFA CL100.0*Average seed
West Ham 3 Manchester United 2 -14.8
-0.3
Manchester City 2 Arsenal 2 +9.6
+0.1
Norwich City 0 Manchester United 1 +9.3
+0.4
West Ham 1 Swansea City 4 +1.5
+0.2
Liverpool 2 Watford 0 -0.1
Week of 5/15100.0*UEFA CL100.0*Average seed
Swansea City 1 Manchester City 1 -14.5
-0.1
Manchester United 3 Bournemouth 1 +9.9
+0.4
Stoke City 2 West Ham 1 +0.2
Southampton 4 Crystal Palace 1 -0.0
Points
Chance Will Win Championship