Exhibit 11-9 
-The graph in Exhibit 11-9 shows a(n)
Definitions:
Depletion
Depletion is an accounting concept used to allocate the cost of extracting natural resources, such as timber or minerals, from the earth, reflecting the consumption of the asset over time.
Natural Resources
Assets that occur in the environment in a natural form, valuable to humans for production or consumption, such as minerals, forests, and water.
Acquisition Cost
The total cost incurred to acquire an asset, including the purchase price and all other expenses associated with bringing the asset to its intended use.
Impairment
The decrease in the market value of an asset below its book value, leading to a write-down of the asset's value on financial statements.
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