A new car worth $21,000 is depreciating in value by $3,000 per year. Complete part (a) through (c) below

a) write a formula that models the car value, y, in dollars, after x years

y=___

Question

A new car worth $21,000 is depreciating in value by $3,000 per year.  Complete part (a) through (c) below

a) write a formula that models the car value, y, in dollars, after x years

y=___

rogue · Answer

THe car's value depreciates at a steady value, so the model is linear, with your slope being -3,000 and your y-int being 21,000, since that is your initial value at x = 0.
y = -3000x + 21000

anonymous · Answer

use the formula from part (a) to determine  after how many  years the car's value will be $6,000.

After_____ years, the car's value will be $6,000

rogue · Answer

Let y = 6000 and solve for x.
6000 = -3000x + 21000

Can you solve that?

anonymous · Answer

yes so how many years

rogue · Answer

You should've gotten x = 5, so five years.