Charlie has a set fee for tree removal but charges a hauling fee as well. The following table lists his total charges for a given number of trees. Trees Charge
5 $690
8 $1065
10 $1315

Using the information given, write an equation for the relation between x (the number of trees) and y (the total cost). Explain how you found your answer.
What would the total cost be for having 14 trees removed? Show your work.