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
Gillingham 1 Swindon 1 +7.5
-0.2
Oldham 2 Cheltenham 1 -5.0
+0.1
Millwall 3 Carlisle 0 +2.0
Doncaster 2 Luton 0 -0.2
Swansea City 4 Leyton Orient 1 -0.2
Tranmere 1 Southend 0 -0.1
Hartlepool 0 Nottm Forest 1 -0.1
Bournemouth 1 Crewe 0 -0.2
Week of 5/3100.0*Relegated100.0*Average seed
Cheltenham 2 Doncaster 1 Yes
-0.1
Leeds 2 Gillingham 1 Yes
-0.4
Carlisle 1 Bournemouth 1 -5.7
+0.1
Points
Chance Will Win Championship