How are these numbers calculated?

Big Games

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

Week of 1/25100.0*Chance in playoffs100.0*First Round Bye100.0*Average seed
Miami 10 Texas 9 +16.7
+16.7
+0.6
Miami 9 Houston 12 -4.6
-36.8
-0.6
If winner is:HomeAway
Houston vs Texas+4.2-20.0
-1.4+6.8
+0.0-0.2
St. Louis vs Houston+3.1-1.2
+6.4-2.4
If winner is:HomeAway
Week of 2/1100.0*Chance in playoffs100.0*First Round Bye100.0*Average seed
Texas vs St. Louis-16.9+9.2
-0.6+0.3
-0.1+0.0
St. Louis vs Miami-3.8In
No+8.2
-0.3+0.8

What If

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

100100100100
If finish:Chance inFirstChance will finish regular season at seed
TWW-LplayoffsRound Bye1234Count
21-0In11.2%1182629,735,800
10-185.8%No8781480,914,688
Total:89.6%3.0%3285910110,650,488
Games Above .500
Chance Will Make Playoffs