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*Conference Nat’l100.0*Average seed
Northampton 0 York 2 +5.2
-0.2
Wycombe 2 Aldershot Town 1 -3.6
+0.1
AFC Wimbledon 2 Exeter City 2 +2.3
-0.3
Burton Albion 1 Plymouth Argyle 0 -0.8
+0.1
Dag & Red 0 Oxford United 1 -0.6
+0.1
Week of 4/20100.0*Conference Nat’l100.0*Average seed
Barnet 1 Wycombe 0 +8.2
-0.2
York 2 Southend 1 +4.0
-0.2
Morecambe 0 Torquay United 2 +3.5
-0.2
Aldershot Town 1 Dag & Red 0 +1.9
+0.1
Gillingham 2 AFC Wimbledon 2 +1.5
-0.3
Bristol Rovers 0 Accrington 1 +0.7
-0.2
Plymouth Argyle 0 Rotherham 1 -0.1
+0.1
Week of 4/27100.0*Conference Nat’l100.0*Average seed
AFC Wimbledon 2 Fleetwood Town 1 No
+1.7
Northampton 2 Barnet 0 -0.5
+0.2
Rotherham 2 Aldershot Town 0 -0.2
+0.2
Rochdale 1 Plymouth Argyle 0 +0.2
Torquay United 3 Bristol Rovers 3 -0.1
Points
Chance Will Win Championship