At the moment, the price is $90,000. We know that it will become $138,000 after 8 years. Finding the difference between the price points, which is 138,000 - 90,000 = 48,000, the last number is interpreted as the accumulated amount for 8 years. Then in a year, the accumulation is 48,000/8 = 6000. This linear combination gives us the general formula of
