How are these numbers calculated?

Big Games

How we did yesterday and who we should root for today.   Explain

Wednesday100.0*Pres Trophy100.0*Average seed
Dallas Stars 3 Chicago Blackhawks 2 +5.6
Columbus Blue Jackets 2 New York Rangers 6 +0.1
Thursday100.0*Pres Trophy100.0*Average seed
New York Islanders 2 Washington Capitals 3 +41.5
+0.4
Tampa Bay Lightning 1 Boston Bruins 2 No
-0.2
Vancouver Canucks 2 St. Louis Blues 3 -1.0
Points
Chance Will Make Playoffs