How are these numbers calculated?

Big Games

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

Week of 7/1100.0*Chance in playoffs100.0*Average seed
Ottawa 4 Worcester 0 +18.5
+1.9
Ottawa 2 Seacoast 0 +14.4
+0.7
Seacoast 1 Boston 1 +1.7
+0.1
Reading 4 Brooklyn 0 -1.7
Maryland 2 Carolina 4 +1.5
+0.1
Western Mass 2 Azul 0 -1.0
-0.0
Vermont 2 Portland Phoenix 4 -0.9
-0.2
NJ Rangers 3 Baltimore 2 -0.4
-0.1
West Virginia 1 Palmetto 1 +0.4
+0.0
Ocean City 4 Bermuda 0 -0.2
Maryland 1 Northern Virginia 0 -0.1
Bermuda 3 Long Island 1 +0.0
Nashville 0 West Virginia 0 +0.0
Week of 7/8100.0*Chance in playoffs100.0*Average seed
Ottawa 5 Portland Phoenix 1 +11.4
+1.2
Vermont 2 Western Mass 1 In
Ottawa 1 Azul 0 +0.4
Seacoast 0 Portland Phoenix 0 +0.1
Maryland 7 Fredericksburg 1 -0.1
Week of 7/15None
Points
Chance Will Make Playoffs