A company paid $110,000 for a new 18-wheeler. When it is 9 years old it will be worth $20,000. Using straight-line depreciation, the value of the trick in dollars, V, is a linear function of its age in years, n. Find the function and the value when the truck is 4 years old.

Question

A company paid $110,000 for a new 18-wheeler. When it is 9 years old it will be worth $20,000. Using straight-line depreciation, the value of the trick in dollars, V, is a linear function of its age in years, n. Find the function and the value when the truck is 4 years old. 
Write the value of the trick V as a function of its age in years, n.

scott · Answer

it loses $90,000 in value over 9 years ... $10,000 per year ... slope the original value is $110,000 ... at 0 years ... intercept