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*Chance in playoffs100.0*First-round bye100.0*Average seed
Arizona 2 Salt Lake City 3 -6.1
No
-0.6
Austin 2 Seattle 1 +1.7
-0.1
Orange County 2 Los Angeles 1 -1.0
Portland 0 Col Springs 1 +0.4
+0.1
Col Springs 3 Austin 0 +0.1
Week of 9/12100.0*Chance in playoffs100.0*First-round bye100.0*Average seed
Salt Lake City 1 Arizona 0 Out
-0.5
Arizona 0 OKC 1 -0.5
Los Angeles 0 Portland 1 -0.3
Seattle 3 Austin 2 +0.2
Portland 0 Sacramento 3 +0.2
Vancouver 1 Orange County 1 +0.1
Week of 9/19100.0*Chance in playoffs100.0*First-round bye100.0*Average seed
Sacramento 0 Arizona 0 -0.3
Vancouver 2 Austin 3 -0.2
Points
Chance Will Make Playoffs