How are these numbers calculated?

Big Games

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

Week of 4/25100.0*Relegated100.0*Average seed
Norwich 0 Reading 2 -12.3
+0.2
Barnsley 1 Wolves 1 +3.1
-0.2
Blackpool 1 Nottm Forest 1 +1.6
Southampton 2 Burnley 2 -1.4
+0.0
Derby 1 Charlton 0 +0.4
-0.1
QPR 0 Plymouth 0 +0.3
-0.0
Birmingham 1 Preston 2 +0.2
Bristol City 1 Sheff Wed 1 +0.2
Coventry 2 Watford 3 +0.2
Cardiff 0 Ipswich 3 +0.1
Sheff United 1 Swansea City 0 +0.1
Week of 5/3100.0*Relegated100.0*Average seed
Charlton 4 Norwich 2 No
+0.2
Plymouth 1 Barnsley 2 No
+1.2
Burnley 4 Bristol City 0 +0.3
Sheff Wed 1 Cardiff 0 +0.3
Nottm Forest 3 Southampton 1 +0.1
-0.2
Points
Chance Will Win Championship