Decide Whether the Given Functions Are Inverses

question 447

True/False

Decide whether the given functions are inverses.
- $$\begin{array} { l } f = \{ ( - 3 , - 6 ) , ( 0,4 ) , ( 4 , - 3 ) , ( 8,10 ) \} \\g = \{ ( - 6 , - 3 ) , ( 4,0 ) , ( - 3,4 ) , ( 10,8 ) \}\end{array}$$

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Definitions:

Machine-Hours

Machine-hours represent the total time that machinery is in operation, used as a basis for allocating machine-related costs to products.

Total Variable Cost

The sum of all costs that vary directly with the level of production, such as materials and labor costs.

Activity Level

The volume of production or the degree of service activity which directly affects the amount of various costs incurred.

Fixed Cost

An expense that does not change with the level of production or sales over a short period.