21. Cost behavior is considered linear whenever a straight line is a reasonable approximation
for the relation between cost and activity.
22. The high-low method uses cost and activity data from just two periods to establish the
formula for a mixed cost.
23. The engineering approach to the analysis of mixed costs involves a detailed analysis of
what cost behavior should be, based on an industrial engineer’s evaluation of the production
methods to be used, the materials specifications, labor requirements, equipment usage,
production efficiency, power consumption, and so on.