Posted by **Maria** on Tuesday, November 11, 2008 at 5:04pm.

In this word problem, I have to assume that it can be described by a linear function:

A photocopying machine purchased new for $4500 loses $900 in value each year.

a) Find the value of the machine after 18 months.

b) When will the book value be $1200?

Thank you for helping me with this.

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