Final answer:
The independent variable is Wesley's sales, and the dependent variable is the amount of money Wesley makes, which depends on the sales according to the given equation.
Step-by-step explanation:
The situation described in the student's question involves Wesley making money based on his sales. His earnings are given by the equation where the amount of money he makes (dependent variable) equals 2 times the square root of his sales (independent variable) plus 3. In this context, the independent variable is the sales that Wesley makes, because it is the value that can be freely changed or controlled. On the other hand, the dependent variable is the amount of money Wesley makes, because this value depends on the sales, as determined by the given equation.