How are these numbers calculated?

Big Games

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

Week of 4/20100.0*Promoted100.0*Average seed
FC United 1 Worksop Town 0 +1.0
+0.3
Buxton 2 Rushall Olympic 0 +0.5
+0.0
Witton Albion 3 Matlock Town 0 -0.3
-0.1
FC United 3 Ashton United 0 +0.1
+0.3
AFC Fylde 0 Stafford 1 +0.1
+0.2
Stocksbridge 0 AFC Fylde 2 -0.1
AFC Fylde 3 Frickley 2 -0.1
Week of 4/27100.0*Promoted100.0*Average seed
Rushall Olympic 0 FC United 1 +0.3
Worksop Town 0 AFC Fylde 0 +0.1
AFC Fylde 1 Rushall Olympic 3 +0.1
Frickley 0 Witton Albion 2 -0.1
Week of 5/4100.0*Promoted100.0*Average seed
FC United 3 Frickley 0 +0.0
Points
Chance Will Win Championship