How are these numbers calculated?

Big Games

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

Week of 8/26100.0*Average seed
Dallas 4 New York 6 -0.1
Earthquakes 0 Galaxy 3 -0.1
Crew 3 Tampa Bay 4 +0.7
Fire 4 Dallas 0 -0.3
Galaxy 2 Earthquakes 1 -0.1
Week of 9/2100.0*Average seed
Wizards 1 Tampa Bay 0 -0.8
Fire 2 Rapids 1 -0.6
Rapids 1 Galaxy 0 +0.3
Fire 3 Crew 1 -0.3
Galaxy 0 Dallas 1 +0.2
Miami 4 New York 1 +0.1
New York 2 Miami 1 -0.1
Revolution 0 Wizards 1 -0.0
Week of 9/9None
Points
Chance Will Make Playoffs