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
Orange County 2 Los Angeles 1 +2.4
+22.2
+0.9
Arizona 2 Salt Lake City 3 +1.0
Portland 0 Col Springs 1 +0.2
-3.4
-0.2
Austin 2 Seattle 1 +1.5
+0.1
Col Springs 3 Austin 0 -4.7
-0.2
Week of 9/12100.0*Chance in playoffs100.0*First-round bye100.0*Average seed
Vancouver 1 Orange County 1 -9.4
-0.2
Portland 0 Sacramento 3 -6.9
-0.1
OKC 3 Col Springs 3 +2.5
+0.1
Arizona 0 OKC 1 +1.3
-0.2
Los Angeles 0 Portland 1 +1.3
+0.1
Week of 9/19100.0*Chance in playoffs100.0*First-round bye100.0*Average seed
Orange County 0 Sacramento 0 Yes
+1.1
Sacramento 0 Arizona 0 +3.5
+0.1
Col Springs 0 Los Angeles 1 +3.4
+0.2
Points
Chance Will Make Playoffs