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
Northampton 2 Hereford 1 +4.6
-0.2
Northampton 0 Milton Keynes 1 -3.7
+0.2
Cheltenham 1 Carlisle 1 -3.5
+0.1
Huddersfield 2 Brighton 2 +3.4
-0.4
Swindon 2 Bristol Rovers 1 +0.6
-0.2
Hartlepool 0 Leeds 1 -0.1
+0.2
Tranmere 1 Yeovil 1 +0.1
+0.1
Week of 5/2100.0*Relegated100.0*Average seed
Carlisle 2 Millwall 0 +27.1
-0.4
Brighton 1 Stockport 0 No
+1.4
Crewe 0 Leicester 3 -6.0
+0.1
Leeds 3 Northampton 0 -5.6
+0.3
Hereford 0 Milton Keynes 1 +0.3
Walsall 1 Oldham 2 +0.3
Bristol Rovers 4 Hartlepool 1 +0.1
Yeovil 0 Colchester 2 +0.2
+0.1
Leyton Orient 1 Huddersfield 1 +0.2
Points
Chance Will Win Championship