How are these numbers calculated?

Big Games

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

Week of 4/13100.0*League One100.0*Average seed
AFC Wimbledon 2 Exeter City 2 -1.7
-0.2
Cheltenham Town 1 Gillingham 0 -1.0
-0.1
Chesterfield 2 Bradford City 2 +0.5
+0.1
Northampton 0 York 2 +0.4
Rotherham 2 Fleetwood Town 1 -0.2
+0.0
Burton Albion 1 Plymouth Argyle 0 -0.1
Rochdale 2 Port Vale 2 +0.0
Week of 4/20100.0*League One100.0*Average seed
Exeter City 0 Cheltenham Town 1 -5.1
-1.2
Bradford City 1 Burton Albion 0 -3.2
-0.2
Fleetwood Town 1 Chesterfield 3 -1.1
-0.2
York 2 Southend 1 +0.4
+0.2
Week of 4/27100.0*League One100.0*Average seed
Chesterfield 4 Exeter City 0 -0.6
Accrington 0 Oxford United 3 -0.4
Southend 0 Morecambe 1 +0.3
Points
Chance Will Win Championship