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
Bournemouth 1 Crewe 0 +0.5
-0.5
Millwall 3 Carlisle 0 +0.5
-0.3
Oldham 2 Cheltenham 1 -0.1
+0.1
Hartlepool 0 Nottm Forest 1 +0.1
Bristol Rovers 0 Brighton 2 +0.1
Week of 5/3100.0*Relegated100.0*Average seed
Cheltenham 2 Doncaster 1 +3.7
-0.3
Crewe 1 Oldham 4 +2.7
-1.0
Carlisle 1 Bournemouth 1 No
+0.1
Swindon 2 Millwall 1 +0.1
Nottm Forest 3 Yeovil 2 +0.0
Points
Chance Will Win Championship