Why does demand rise when house prices increase? (Macroeconomics)

According to this excerpt, a key part of our national security strategy is

Zapper has beginning equity of $257,000, net income of $51,000, dividends of $40,000 and investments by stockholders of $6,000. its ending equity is

Russell's is considering purchasing $697,400 of equipment for a four-year project. the equipment falls in the five-year macrs class with annual percentages of .2, .32, .192, .1152, .1152, and .0576 for years 1 to 6, respectively. at the end of the project the equipment can be sold for an estimated $135,000. the required return is 13.2 percent and the tax rate is 23 percent. what is the amount of the aftertax salvage value of the equipment assuming no bonus depreciation is taken