Given the following data, use least-squares regression to derive a trend equation Period 1 2 3 4 5 6 Demand 7 8 8 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) [Select) y = [Select v + where y = Demand and x = Period What is your estimate of the demand in period 72 Estimated demand in period 7 is Select (round your response to two decimal places) What is your estimate of the demand in period 122 Estimated demand in period 12 is [Select) round your response to two decimal places)