Suppose you buy a piece of office equipment for USD $10,000.$ After $3$ years you sell it for a scrap value of USD $1,000.$ The equipment is depreciated linearly over $3$ years. The rate of depreciation of the piece of equipment is

USD $3,000\mathrm{.}00$ per year

USD $9,000\mathrm{.}00$ per year

USD $2,250\mathrm{.}00$ per year

USD $4,500\mathrm{.}00$ per year

USD $3,333\mathrm{.}33$ per year

None of the above.