Fresh Foods is a chain of supermarkets that operates over 300 stores across Canada. The Marketing Director of Fresh Foods wishes to study the effect of price on the weekly sales of two-liter bottles of their own private brand diet cola. The marketing director believes that it would be reasonable to price the diet cola between $0.50 and $2.00. He selects a random sample of 20 stores and then randomly assigns a selling price for the two-liter bottle of diet cola between $0.50 and $2.00 in each of the selected stores. The results after one week of sales are as follows - Determine the coefficient of determination and interpret it