How are these numbers calculated?

Big Games

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

Week of 10/20100.0*Average seed
Åtvidaberg 3 Helsingborg 0 +0.8
Kalmar 1 Djurgården 2 -0.2
AIK 1 IFK Norrköping 0 +0.2
Häcken 1 Halmstad 3 +0.1
Halmstad 1 Mjällby 0 +0.1
Elfsborg 0 Häcken 0 -0.0
Week of 10/27100.0*Average seed
Syrianska 4 Åtvidaberg 1 -0.7
Djurgården 1 Gefle 1 -0.0
Week of 11/3100.0*Average seed
IFK Göteborg 2 IFK Norrköping 0 +0.6
Åtvidaberg 2 Häcken 2 +0.4
Points
Chance Will Win Championship