Final answer:
The given scenario describes Joey's salary as a base of $30,000 per year plus a 4.15% commission on sales. The relationship between salary and sales is exponential.
Step-by-step explanation:
This question falls under the subject of Mathematics and is appropriate for high school level students.
The given scenario describes Joey's salary as a base of $30,000 per year plus a 4.15% commission on sales. To determine whether this relationship is linear or exponential, we need to analyze how the salary changes in relation to the sales.
In this case, since the commission is calculated as a percentage of the sales, the relationship between salary and sales is exponential. As the sales increase, the commission and salary will also increase exponentially.