Given the following data, use least-squares regression to derive a trend equation: 1 N Period 3 5 4 un 6 7 Demand 8 8 8 00 10 9 15 The least-squares regression equation that shows the best relationship between demand and period is (round your responses to two decimal places): 4 + [Select] y = [ Select) where y = Demand and x = Period What is your estimate of the demand in period 7? Estimated demand in period 7 is [Select] (round your response to two decimal places). What is your estimate of the demand in period 12? Estimated demand in period 12 is [Select) (round your response to two decimal places)