How are these numbers calculated?

Big Games

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

Week of 4/21100.0*Relegated100.0*Average seed
Charlton 2 Wycombe 1 +17.0
-0.5
Exeter City 4 Walsall 2 -4.7
+0.0
Chesterfield 2 Rochdale 1 +0.4
-0.1
Oldham 1 Preston 1 +0.3
Leyton Orient 2 Yeovil 2 +0.2
Week of 4/28100.0*Relegated100.0*Average seed
Wycombe 3 Notts County 4 +12.5
-0.5
Hartlepool 2 Leyton Orient 1 -5.4
+0.1
Yeovil 3 Chesterfield 2 -0.6
+0.2
Walsall 1 Huddersfield 1 +0.4
Carlisle 4 Exeter City 1 -0.1
+0.1
Sheff United 2 Stevenage 2 +0.1
Week of 5/5100.0*Relegated100.0*Average seed
Sheff Wed 2 Wycombe 0 -0.4
Chesterfield 2 Brentford 3 +0.3
Exeter City 2 Sheff United 2 +0.1
Points
Chance Will Win Championship