How are these numbers calculated?

Big Games

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

Week of 4/26100.0*Relegated100.0*Average seed
Oldham 2 Cheltenham 1 +12.2
-0.7
Bournemouth 1 Crewe 0 +6.8
+0.1
Gillingham 1 Swindon 1 -3.3
+0.1
Millwall 3 Carlisle 0 +0.7
-0.2
Week of 5/3100.0*Relegated100.0*Average seed
Cheltenham 2 Doncaster 1 No
+0.7
Leeds 2 Gillingham 1 -5.6
+0.1
Carlisle 1 Bournemouth 1 -0.3
-0.0
Brighton 0 Swansea City 1 +0.2
Southend 1 Port Vale 1 +0.2
Nottm Forest 3 Yeovil 2 +0.2
Northampton 2 Tranmere 1 +0.2
Leyton Orient 3 Bristol Rovers 1 +0.1
Crewe 1 Oldham 4 +0.2
Points
Chance Will Win Championship