How are these numbers calculated?

Big Games

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

Week of 9/5100.0*Average seed
Islanders 2 RailHawks 0 +0.5
Thunder 5 Islanders 2 -0.3
Islanders 2 Rhinos 0 +0.3
Battery 1 Thunder 3 +0.2
Battery 2 Miami FC 1 -0.0
Week of 9/12100.0*Average seed
RailHawks 2 Islanders 1 -0.3
RailHawks 2 Impact 0 -0.2
Rhinos 0 Battery 0 +0.1
Week of 9/19100.0*Average seed
Miami FC 1 Islanders 3 +0.3
Thunder 2 Battery 3 -0.3
Points
Chance Will Make Playoffs