Sales records indicate that if Blu-ray players are priced at $250, then a large store sells an average of 14 units per day. If they are priced at $150, then the store sells an average of 28 units per day. Find and graph the linear demand function for Blu-ray sales. For what prices is the demand function defined? The linear demand function for Blu-ray sales is d= ***** (Type an expression using p as the variable. Use integers or simplified fractions for any numbers in the equation.)