Your boss would like you to estimate the fixed and variable components of a particular cost. Actual data for this cost over four recent periods appear below. 
Using the least-squares regression method, what is the cost formula for this cost?
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The quality of being calm, graceful, and confident in manner or bearing, often under pressure.
Confidence
A feeling of self-assurance arising from an appreciation of one's own abilities or qualities.
Posture
Posture is the position in which someone holds their body when standing or sitting, and proper posture is important for health and well-being.
Oral Hygiene
The practice of keeping the mouth and teeth clean to prevent dental problems and bad breath.
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