Question 183568
y=-1777x+27,153 
2004=-1,777*4+27,153
2004=-7,108+27,153
2004=20,065 ans.
2009=-1,777*9+27,153
2009=-15,993+27,173
2009=11,180 ans
7,606=-1,777x+27,173
7,606=-1,777x+27,173
1,777x=-7,606+27,173
1,777x=19,567
x=19,567/1,777
x=11.01 or the year 2011 the gun death will be 7,606.
Proof:
2011=-1,777*11.01+27,153
2011=-19,564.77+27,153
2011~7,606
You also asked to predict the number of deaths in the year 7606. 
7606=-1,777*5,606+27,173
7606=-9,961,862+27,173
7606=-9,934,689 deaths. Not a valid ans.