The equation y= -1777x + 27,153 can be used to predict the number of gun deaths in the United States x years after 2000, that is x=0 corresponds to 2000, x=2 corresponds to 2002, x=5 corresponds to 2005, and so on. Predict the gun deaths in 2005 and 2007. In what year will the number of gun deaths be 11,160?
<Predict the gun deaths in 2005 and 2007>
A simple case of letting x = 5, and then x=7
for the last one, set y = 11160 and solve for x
BTW, your formula doesn't make an sense,
according to it by 2015 there will be no gun deaths in the US.