How are these numbers calculated?

Big Games

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

Week of 9/25100.0*Chance in playoffs100.0*Average seed
Crew 2 Miami 1 -9.2
-0.3
Tampa Bay 1 New York 2 +0.1
Wizards 0 Rapids 0 +0.0
Week of 10/2100.0*Chance in playoffs100.0*Average seed
Miami 4 Crew 1 +17.1
+0.6
Revolution 2 New York 1 -12.7
-0.3
Earthquakes 1 Wizards 0 +0.1
Week of 10/9100.0*Chance in playoffs100.0*Average seed
Miami 2 Rapids 0 +43.9
+0.9
DC United 1 Revolution 1 -10.8
-0.2
Points
Chance Will Make Playoffs