Question 1076469
the formula would be:


f = p - r*t


p is 18,300
f is 7,500
t is number of years
r is the average rate of depreciation for each year.


formula becomes:


7,500 = 18,300 - r*t


you would solve this equation for r as follows:


start with 7,500 = 18,300 - r*t


add r*t to both sides of the equation and subtract 7,500 from both sides of the equation to get:


r*t = 18,300 - 7,500


divide both sides of the equation by t to get:


r = (18,300 - 7,500) / t


for example:


if t = 5 years, then the formula becomes:


r = (18,300 - 7,500) / 5


solve for r to get r = 2,160 per year.


the car depreciates by an average of 2,160 each year.


the price of the new car is 18,300
after 1 year, the value is 18,300 - 2,160 = 16,140
after 2 years, the value is 16,140 - 2,160 = 13,980
after 3 years, the value is 13,980 - 2,160 = 11,820
after 4 years, the value is 11,820 - 2,160 = 9,660
after 5 years, the value is 9,660 - 2,160 = 7,500