Jeffrey is buying a used BMW for [tex] \$17,000 [/tex]. The value of the car depreciates [tex] 5\% [/tex] per year from the time he bought the car. The value of Jeffrey's car, [tex] V(t) [/tex], can be represented by which of the following functions? Select all that apply.

[tex]
\begin{array}{ll}
V(t)=17,000(1+0.05)^t & \square \text{Yes} \quad \square \text{No} \\
V(t)=17,000(1-0.05)^t & \square \text{Yes} \quad \square \text{No} \\
V(t)=17,000(0.95)^t & \square \text{Yes} \quad \square \text{No} \\
V(t)=17,000(1.05)^t & \square \text{Yes} \quad \square \text{No}
\end{array}
[/tex]



Answer :

To determine which functions correctly represent the value of Jeffrey's car after it depreciates by 5% per year, let's evaluate each one:

1. [tex]\( V(t) = 17,000 (1 + 0.05)^t \)[/tex]
- This equation implies that the value of the car is increasing by 5% each year. Since we know the car is depreciating, this does not represent the correct situation.
- Therefore, the answer is:
[tex]\[ \square No \][/tex]

2. [tex]\( V(t) = 17,000 (1 - 0.05)^t \)[/tex]
- This equation correctly represents the value of the car as depreciating by 5% each year. The factor [tex]\((1 - 0.05)\)[/tex] or 0.95 correctly models a 5% annual decrease.
- Therefore, the answer is:
[tex]\[ \square Yes \][/tex]

3. [tex]\( V(t) = 17,000 (0.95)^t \)[/tex]
- This is another correct representation of the depreciation process. The value 0.95 within the equation directly indicates a yearly reduction by 5%.
- Therefore, the answer is:
[tex]\[ \square Yes \][/tex]

4. [tex]\( V(t) = 17,000 (1.05)^t \)[/tex]
- This equation implies the value of the car is increasing by 5% annually, which is contrary to our information that the value depreciates.
- Therefore, the answer is:
[tex]\[ \square No \][/tex]

In summary, the functions that correctly represent the depreciation of Jeffrey's car are:
[tex]\[ V(t) = 17,000 (1 - 0.05)^t \quad \text{and} \quad V(t) = 17,000 (0.95)^t \][/tex]