Anew toyota rav4 costs $23,500. the car's value depreciates linearly to $18,823 in three years time.1 write a formula which expresses its value, v, in terms of its age, t, in years.

For this case we must find a linear equation of the form:

Where,

b: initial value of the car

m: decrease rate per year

t: number of years

v: value of the car

For the slope of the line we have:

The initial value of the car is:

So, replacing values we have:

a formula which expresses its value, v, in terms of its age, t, in years is:

3x^3-x^2+6x-9