Regents Exam: Algebra I August 2016 (Problem 24 of 37)

The video tutorial explains how to analyze an investment problem using an exponential function. It describes the function v(x) = 30,000 * 0.78^x, where x is the number of years since the investment was made. The tutorial identifies the function as an exponential decay model, with a base of 0.78 indicating a 22% annual decrease in value. The video guides viewers through eliminating incorrect options and solving for the rate of decay, concluding that the portfolio decreases by 22% per year.

How do you determine the rate of decay from the function?

What is the calculated rate of decay for Milton's portfolio?