How are these numbers calculated?

Big Games

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

Week of 3/1100.0*Chance in playoffs100.0*Average seed
Dallas 20 Houston 27 -10.9
-0.3
New York 17 LA 14 +5.0
+0.1
St Louis 23 Seattle 16 +1.0
If winner is:HomeTieAway
Week of 3/8100.0*Chance in playoffs100.0*Average seed
Dallas vs New York+4.5-3.3-11.2
+0.1-0.0-0.2
LA vs Tampa Bay-3.5+1.6+5.6
-0.0+0.0+0.1
Houston vs Seattle+1.4-2.2-4.9

What If

Chances based on how well the Dallas finish out the regular season.   Explain

100100100100
If finish:Chance inChance will finish regular season at seed
TWW-L-Tplayoffs1234Count
86-0-0In4951932,546
7.55-0-1In39614,165
75-1-099.8%138704,799,223
4-0-2In40605
6.54-1-199.6991017,228
64-2-094.729359,646,394
3-1-2In10021
5.53-2-190.6190927,009
53-3-071.00712819,754,426
2-2-258.6594129
4.52-3-152.505246219,782
42-4-029.803059125,287,150
1-3-225.02569616
3.51-4-18.8961307,039
31-5-03.0345521,462,707
0-4-2Out1003
2.50-5-1Out1882990
20-6-0Out793171,075
Total:73.0%46922532,129,808
Games Above .500
Chance Will Make Playoffs