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
Cheltenham 1 Carlisle 1 +8.2
-0.3
Northampton 2 Hereford 1 +7.4
-0.2
Northampton 0 Milton Keynes 1 -7.0
+0.1
Huddersfield 2 Brighton 2 -2.6
+0.1
Swindon 2 Bristol Rovers 1 +0.7
-0.1
Tranmere 1 Yeovil 1 +0.5
Hartlepool 0 Leeds 1 -0.4
+0.0
Milton Keynes 0 Walsall 1 -0.2
Colchester 0 Peterborough 1 -0.2
Millwall 2 Leyton Orient 1 -0.1
Week of 5/2100.0*Relegated100.0*Average seed
Carlisle 2 Millwall 0 -47.6
+0.9
Brighton 1 Stockport 0 +12.7
-0.2
Leeds 3 Northampton 0 -8.0
+0.2
Scunthorpe 1 Tranmere 1 -0.3
Peterborough 2 Swindon 2 -0.3
Hereford 0 Milton Keynes 1 -0.3
Yeovil 0 Colchester 2 -0.3
Walsall 1 Oldham 2 -0.3
Crewe 0 Leicester 3 -0.3
+0.2
Leyton Orient 1 Huddersfield 1 -0.2
Bristol Rovers 4 Hartlepool 1 +0.2
Points
Chance Will Win Championship