As a result of the differences in useful lives, Spam am airlines would appear more profitable.
Straight line depreciation is a method used to transfer the cost of an asset to the income statement of a company. The straight line depreciation expenses the cost linearly.
Straight line depreciation expense = (Cost of asset - Salvage value) / useful life
The longer the useful life of an asset, the longer the years the cost of the asset would be spread out over the years. Thus, the longer the useful life, the more profitable the asset.
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