A small business purchases a

piece of equipment for $875. After 5 years the equipment will be outdated, having no value.

(a) Write a linear equation giving the value of the equipment y in terms of the time

(b) Find the value of the equipment when X=2

(c) Estimate (to two-decimal-place accuracy) the time when the value of the equipment is $200 ...?

It is assumed that the equipment will lose value at a constant yearly rate. Then we can find a linear function to represent the value of the equipment.

The rate at which the equipment loses value is $ 875 / 5 years = $ 175 / year.

a) y = 875 - 175x

b) x = 2 = > y = $875 - [S175 / year] (2year) = $875 - $350 = $ 525

c) y = 200 = 875 - 175x = > x = [875 - 200] / 175 = 3.86 years