Given the following data, use least-squares regression to derive a trend equation:
Period 1 2 3 4 5 6
Demand 7 10 10 12 13 13
The least-squares regression equation that shows the best relationship between demand and period is (round your responses to two decimal places): Modifying Above y with caret equals nothing plus nothing, where Modifying Above y with caret equals Demand and x equals Period.