Final answer:
The simplest rational expression representing the depth of a pond among the given options is 3x - 8/5, meaning option 2 is the correct answer.
Step-by-step explanation:
The student is seeking to identify the simplest rational expression that represents the depth of a pond. When simplifying rational expressions, our goal is to find the expression that has no common factors other than 1 in the numerator and denominator. Let's examine the options provided:
Based on simplifications, the correct answer is option 2, which is 3x - 8/5, as it cannot be simplified further and does not change the relationship between the terms.