A community bird-watching society makes and sells simple bird feeders to raise money for its conservation activities. The materials for each feeder cost $6, and the society sells an average of 28 feeders per week at a price of $10 each. The society has been considering raising the price, so it conducts a survey and finds that for every dollar increase, it loses two sales per week.
Find a function P that models weekly profit in terms of price per feeder. (Let x represent the number of dollars the price is increased.)
