Answer:
$9,600
Step-by-step explanation:
When you use the straight line depreciation method, the depreciation expense is the same for every year. The only difference can result if the asset was purchased during the year, and the depreciation for year 1 would only be partial and proportionate to the number of months of use.
In this case, the depreciation expense per year = (purchase price - residual value) / useful life = ($57,000 - $9,000) / 5 = $48,000 / 5 = $9,600 per year (the depreciation expense is the same for all the five years).