"Suppose that a company has just purchased a new computer for $2100. The company chooses to depreciate using the straight-line method for 7 years. Write a linear function that expresses the book value of the computer as a function of its age." I don't see how they got "V(x)=-300x+2100" as the answer. Help??

Question

anonymous · Answer

this question says two thing. first how much is the laptop at year 0?

anonymous · Answer

meaning right now how much does it cost brand new

anonymous · Answer

$2100

anonymous · Answer

the next part of the problem says that the computer will be worth nothing at the end of 7 years

anonymous · Answer

s0 7x=2100, solving for x, x=300

anonymous · Answer

this means that every year the computer value will drop $300 dollars, at the end of x years  it would drop 300x dollars

anonymous · Answer

since the price is dropping, this part of the equation gets a negative

anonymous · Answer

the equation becomes v=-300x+2100

anonymous · Answer

Okay, I see it now. Thanks :)

anonymous · Answer

you are welcome