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 In
Austin 2 Seattle 1 +3.1
+0.1
Orange County 2 Los Angeles 1 -0.1
-0.0
Portland 0 Col Springs 1 -4.2
-0.1
Col Springs 3 Austin 0 -5.6
-0.1
Week of 9/12100.0*Chance in playoffs100.0*First-round bye100.0*Average seed
Arizona 0 OKC 1 +16.3
+0.9
OKC 3 Col Springs 3 -15.4
-0.5
Portland 0 Sacramento 3 -4.4
-0.2
Los Angeles 0 Portland 1 +3.4
+0.3
Vancouver 1 Orange County 1 +0.0
Week of 9/19100.0*Chance in playoffs100.0*First-round bye100.0*Average seed
Col Springs 0 Los Angeles 1 +23.4
+0.4
Sacramento 0 Arizona 0 +13.5
+0.3
Points
Chance Will Make Playoffs