Marketers for a drugstore chain chose two resort areas to test market a new sunscreen lotion After a summer of varying the selling price and recording the monthly demand the marketers arrived at the demand table shown to the right where y is the number of bottles of sunscreen purchased per month in thousands at x dollars per bottle XX y 5 0 5 5 6 0 6 5 7 0 2 0 1 8 1 6 1 3 1 1 A Use the method of least squares to find a demand equation The demand equation is y Type an expression using x as the variable Round to the nearest hundredth as needed