Questions: Sean purchased a piece of sports memorabilia for 5900, and it is expected to increase in value by 9% per year.
Write a function y to represent the value of the piece of sports memorabilia after x years.
y=5900(1.09)
Transcript text: Sean purchased a piece of sports memorabilia for $\$ 5900$, and it is expected to increase in value by $9 \%$ per year.
Write a function $y$ to represent the value of the piece of sports memorabilia after $x$ years.
\[
y=5900(1.09)
\]
Solution
Solution Steps
To solve this problem, we need to create a function that models the exponential growth of the value of the sports memorabilia. The initial value is $5900, and it increases by 9% each year. This can be represented by the formula \( y = 5900 \times (1.09)^x \), where \( y \) is the value after \( x \) years.
Step 1: Define the Exponential Growth Function
The value of the sports memorabilia increases by \(9\%\) each year. This can be modeled using an exponential growth function. The general formula for exponential growth is:
\[
y = a \times (1 + r)^x
\]
where:
\(y\) is the future value,
\(a\) is the initial value,
\(r\) is the growth rate,
\(x\) is the number of years.
Step 2: Substitute the Given Values
In this problem, the initial value \(a\) is \(5900\), and the growth rate \(r\) is \(0.09\) (since \(9\%\) is equivalent to \(0.09\)). Substituting these values into the formula gives: