How are these numbers calculated?

Big Games

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

Week of 9/18100.0*Average seed
St. Louis 2 Aztex 1 +0.3
Week of 9/25100.0*Average seed
Aztex 4 St. Louis 2 -0.5
Miami FC 1 Rhinos 0 -0.4
RailHawks 3 Aztex 1 +0.2
Week of 10/2100.0*Average seed
St. Louis 1 Rhinos 2 +0.9
Impact 2 Aztex 0 +0.7
Whitecaps 2 Timbers 2 +0.1
Points
Chance Will Make Playoffs