LEAST-SQUARED METHOD of approximating cost is a statistical approach that is both objective and considers all the data points. By using mathematical formulas to arrive at the best possible cost line (i.e., the regression line), it is more accurate than the methods mentioned previously. The regression line is in the form Y=a + bX, where X is the independent variable and Y is the dependent variable. The coefficient of determination (R2) can be used to judge the line's goodness of fit.

COST DRIVER is any activity or series of activities that takes place within an organization and causes costs to be incurred. Cost drivers are used in a system of activity-based costing to charge costs to products or services. Cost drivers are applied to cost pools, which relate to common activities. Cost drivers are not restricted to departments or sections, as more than one activity may be identified within a department.

LAND, in terms of accounting, is the value of real estate less the value of improvements, e.g. buildings.

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