Detroit Lions Playoff Chances 2014 50/50

Lost to Green Bay 20-30, average seed up 2.5 to 21
8-0-5   .615

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
Indianapolis 17 Houston 10 -0.2
Philadelphia 27 Dallas 38 -0.1
New England 41 Miami 13 +0.1
Kansas City 31 Oakland 13 +0.1
Cleveland 0 Cincinnati 30 -0.1
Baltimore 20 Jacksonville 12 +0.1
Seattle 17 San Francisco 7 -0.1
Week of 12/20100.0*Average seed
Chicago 14 Detroit 20 -1.7
Oakland 26 Buffalo 24 -0.2
Carolina 17 Cleveland 13 -0.2
Week of 12/28100.0*Average seed
Green Bay 30 Detroit 20 +1.5
New England 9 Buffalo 17 -0.3
NY Giants 26 Philadelphia 34 +0.3
Houston 23 Jacksonville 17 +0.2
San Francisco 20 Arizona 17 +0.2
Games Above .500
Chance Will Make Playoffs