Final answer:
The depreciation cost of an asset using the straight-line method is represented by a line drawn from its initial cost to its salvage value. Present discounted value is an essential tool across various fields to compare present costs to future benefits.
Step-by-step explanation:
Graphically, the depreciation cost of an asset can be determined by drawing a straight line between its first cost and its salvage value when using the straight-line depreciation method. This method of depreciation spreads the cost of the asset evenly over its useful life. Present discounted value is a concept that is utilized across various fields, including finance, economics, and business decision-making, as it allows for the comparison of present costs against the present discounted value of future benefits. For example, businesses use it when planning capital investments, and governments may apply it when evaluating infrastructure projects, including comparing the costs of adding safety features to a highway against future safety benefits.