Final answer:
A higher estimated useful life will result in lower depreciation expense per year and higher net income.
Step-by-step explanation:
Assuming straight-line depreciation is used, a higher estimated useful life will result in a lower depreciation expense per year and a higher net income.
Straight-line depreciation allocates the cost of an asset equally over its estimated useful life. This means that a higher estimated useful life will result in lower annual depreciation expenses, as the cost is spread out over a longer period. This, in turn, will result in a higher net income, as depreciation is a non-cash expense that reduces taxable income.
For example, let's say a company purchases a machine for $10,000 with an estimated useful life of 5 years. Using straight-line depreciation, the annual depreciation expense would be $2,000 ($10,000 / 5 years). If the estimated useful life is increased to 10 years, the annual depreciation expense would be $1,000 ($10,000 / 10 years), resulting in lower expenses and a higher net income.
The correct answer is b) higher.