How are these numbers calculated?

Big Games

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

Week of 4/27100.0*Down to Championship100.0*Average seed
Sunderland 4 Cardiff 0 +3.3
Week of 5/3100.0*Down to Championship100.0*Average seed
Man United 0 Sunderland 1 +7.9
-0.1
Sunderland 2 West Brom 0 +2.1
Stoke 4 Fulham 1 -1.3
+0.1
Chelsea 0 Norwich 0 -1.1
+0.1
Aston Villa 3 Hull 1 +0.7
Newcastle 3 Cardiff 0 -0.4
+0.1
Arsenal 1 West Brom 0 -0.1
Week of 5/11100.0*Down to Championship100.0*Average seed
West Brom 1 Stoke 2 -0.5
Norwich 0 Arsenal 2 Yes
-0.1
Fulham 2 Crystal Palace 2 +0.2
Cardiff 1 Chelsea 2 +0.0
Points  (Full Screen)
Chance Will Win Championship  (Full Screen)