Seattle Seahawks Playoff Chances 2014 50/50

Beat St. Louis 20-6, average seed down 0.5 to 31
11-0-4   .733

How are these numbers calculated?

Big Games

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

Week of 12/11100.0*Average seed
Seattle 17 San Francisco 7 -1.4
Cleveland 0 Cincinnati 30 +0.2
St. Louis 6 Arizona 12 +0.1
Indianapolis 17 Houston 10 +0.1
Buffalo 21 Green Bay 13 -0.1
Philadelphia 27 Dallas 38 +0.1
Baltimore 20 Jacksonville 12 -0.0
Week of 12/20100.0*Average seed
Arizona 6 Seattle 35 -1.3
Cincinnati 37 Denver 28 +0.1
San Francisco 35 Philadelphia 38 +0.1
St. Louis 27 NY Giants 37 +0.1
Houston 25 Baltimore 13 +0.0
Week of 12/28100.0*Average seed
Seattle 20 St. Louis 6 -1.0
Games Above .500
Chance Will Make Playoffs