Solve.
-The average value of a certain type of automobile was $\$ 20,640$ in 2006 and depreciated to $\$ 11,340$ in 2010 . Let $y$ be the average value of the automobile in the year $x$, where $x = 0$ represents 2006 . Write a linear equation that relates value $\mathrm { y }$ to year $\mathrm { x }$.
A) $y = - 2325 x + 2040$
B) $y = - 2325 x + 11,340$
C) $y = - \frac { 1 } { 2325 } x - 11340$
D) $y = - 2325 x + 20,640$

Question

Quizplus · Accepted Answer

The depreciation from 2006 to 2010 is $20,640 - 11,340 = 9,300$. This occurred over 4 years, so the annual depreciation is $9,300 / 4 = 2,325$. The equation is $y = -2325x + 20,640$, where $x = 0$ corresponds to the year 2006, and $y$ is the value of the automobile.

Solve -The Average Value of a Certain Type of Automobile $20,640\$ 20,640$20,640

Solve
-The Average Value of a Certain Type of Automobile $\$ 20,640$