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 -6.0
+3.3
If winner is:HomeAway
Houston vs Texas-4.7+22.5
No+23.4
-0.1+0.7
St. Louis vs Houston-4.2+1.6
-0.4+0.1
-0.1+0.0
If winner is:HomeAway
Week of 2/1100.0*Chance in playoffs100.0*First Round Bye100.0*Average seed
Texas vs St. Louis+42.1-23.1
+8.9No
+0.7-0.4
St. Louis vs Miami-4.4+11.9
+1.2-3.4

What If

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

100100100100
If finish:Chance inFirstChance will finish regular season at seed
TWW-LplayoffsRound Bye1234Count
22-0In79.5%801476,795,770
11-150.9%No15364944,653,589
00-2OutNo10059,201,129
Total:26.7%4.9%571573110,650,488
Games Above .500
Chance Will Make Playoffs