Answer:
-60 
 
Step-by-step explanation: 
 
Increase in population is given by positive sign 
 
Change in population in 5 years = -300 
 
Decrease in population is represented by negative sign 
 
Change in population in 1 year = -300\5 
 
 = -60 
 
Town's population faces a decrease of 60 residents each year. 
 
Explanation: