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
Portland 0 Col Springs 1 +2.2
+16.5
+0.8
Arizona 2 Salt Lake City 3 +0.5
Orange County 2 Los Angeles 1 -0.1
-0.6
-0.1
Austin 2 Seattle 1 +0.1
+2.3
+0.2
Col Springs 3 Austin 0 +19.8
+0.7
Week of 9/12100.0*Chance in playoffs100.0*First-round bye100.0*Average seed
Arizona 0 OKC 1 -19.4
-0.4
Los Angeles 0 Portland 1 +11.2
+0.3
Portland 0 Sacramento 3 -2.9
-0.1
Vancouver 1 Orange County 1 +2.0
+0.1
OKC 3 Col Springs 3 +1.6
+0.1
Week of 9/19100.0*Chance in playoffs100.0*First-round bye100.0*Average seed
Col Springs 0 Los Angeles 1 No
-0.9
Sacramento 0 Arizona 0 -3.4
+0.1
Points
Chance Will Make Playoffs