A heat exchanger is bought by a company for $180,000. It is considered to depreciate over 10 years to a scrap value of $10,000. Assuming a linear model for depreciation, write the equation of its value, V (in dollars), when t years have elapsed after the purchase (t < or equal 10)
treat the given data as two ordered pairs
(0,180000), (10,10000) , where the first element is the time, and the 2nd is the value
slope = (10000 - 180000)/(10-0)
= -17000 , interpret that as depreciating $17000 each year
equation:
V = -17000t + 180000
(0,180000) would be like the y-intercept of y = mx+b