If there is no linear relationship between two variables 
and 
, the coefficient of determination must be 
1.0.
Definitions:
Fixed Costs
Costs that remain constant regardless of the level of production or sales activities, such as lease payments and salaries.
Relevant Range
The range of activity within which the assumptions about fixed and variable cost behaviors remain valid.
Relevant Range
The range of activity or volume over which the assumptions about fixed and variable costs are valid.
Variable Cost
Expenses that vary directly with the level of production or sales volume, such as materials, labor, and utility costs.
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