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*Championship100.0*Average seed
Sunderland 3 Chelsea 2 +17.2
-0.2
Sunderland 3 Everton 0 +14.3
-0.1
Aston Villa 0 Newcastle United 0 +9.6
-0.1
Norwich City 0 Manchester United 1 -4.8
+0.1
Norwich City 4 Watford 2 +0.9
-0.2
Week of 5/15100.0*Championship100.0*Average seed
Newcastle United 5 Tottenham Hotspur 1 +0.4
Everton 3 Norwich City 0 +0.2
Points
Chance Will Win Championship