How are these numbers calculated?

Big Games

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

Week of 4/24100.0*Average seed
Torquay 1 Macclesfield 0 +1.2
Crewe 5 Accrington 1 -0.1
Accrington 1 Barnet 0 -0.1
Hereford 2 Rochdale 1 -0.1
Lincoln City 1 Bury 0 -0.1
Barnet 0 Rotherham 1 +0.1
Cheltenham 1 Aldershot 2 +0.1
Week of 5/8100.0*Average seed
Crewe 0 Bradford 1 +0.4
Hereford 3 Rotherham 0 -0.3
Torquay 0 Notts County 0 -0.1
Burton 3 Grimsby 0 -0.1
Lincoln City 0 Macclesfield 0 +0.1
Points
Chance Will Win Championship