How are these numbers calculated?

Big Games

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

Week of 9/19100.0*Average seed
Geylang 5 Balestier 1 +0.3
Sembawang 0 Tampines 7 -0.1
Gombak 1 Woodlands 4 -0.1
SAFFC 1 Home 1 -0.0
Week of 9/26100.0*Average seed
Geylang 1 Tampines 2 -0.8
Clementi 0 Home 2 -0.1
Sembawang 0 Woodlands 3 -0.1
Week of 10/3100.0*Average seed
Sengkang 1 Geylang 4 +0.5
Tampines 1 T. Pagar 1 -0.2
Points
Chance Will Win Championship