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
Islanders 0 Timbers 1 +0.2
Baltimore 2 RailHawks 4 -0.1
Week of 9/25100.0*Average seed
Baltimore 1 Timbers 3 +0.1
RailHawks 2 Islanders 1 -0.1
Week of 10/2100.0*Average seed
St. Louis 1 Rhinos 2 -0.1
Whitecaps 2 Timbers 2 -0.1
Points
Chance Will Make Playoffs