Final answer:
The y-intercept in Ron's problem represents the initial amount of energy produced by his existing solar panels before any new ones are added, hence answer D is correct.
Explanation:
In the context of this problem, specifically within a linear relationship, the y-intercept of the line would represent the initial amount of energy that Ron's solar panels are producing without the addition of any new panels. Hence, the correct answer is D. The solar panels already on the garage produce 600 watts of energy. The slope of the line, on the other hand, would represent the additional energy produced per each new solar panel added. Therefore, the y-intercept gives us the initial state, or in this context, the total energy production from the solar panels already on the garage before adding any new ones.
Learn more about y-intercept here:
https://brainly.com/question/29113022
#SPJ2