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 -6.3
+6.2
If winner is:HomeAway
Houston vs Texas-18.8+18.8
No+14.6
-0.6+0.6
St. Louis vs Houston+6.2-6.2
-2.1+2.1
+0.1-0.1
If winner is:HomeAway
Week of 2/1100.0*Chance in playoffs100.0*First Round Bye100.0*Average seed
Texas vs St. Louis+31.3-31.3
+14.6No
+0.7-0.7
St. Louis vs Miami-10.4+10.4
+10.4-10.4
+0.1-0.1

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
22-0In58.3%583388,426,189
11-154.2%No8464616,810,207
00-2OutNo1008,431,100
Total:52.1%14.6%1513254833,667,496
Games Above .500
Chance Will Make Playoffs