Below are cost and activity data for a particular cost over the last four periods. Your boss has asked you to analyze this cost so that management will have a better understanding of how this cost changes in response to changes in activity.

 

Activity

Cost

Period 1

47

$474

Period 2

44

$460

Period 3

42

$450

Period 4

40

$440

Required:

Using the least squares regression method, estimate the cost formula for this cost.