A high school invests in new computer lab equipment costing $⁢22,000 , expecting it to last 8 years with a salvage value of $⁢2,000 Which equation represents its straight-line depreciation?

The equipment loses $22,000 − $2,000 = $20,000 in value over 8 years, so its annual straight-line depreciation is $20,000 ÷ 8 = $2,500. Starting at $22,000 and subtracting $2,500 for each year gives D(t) = 22,000 − 2,500t, the equation for choice A.

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