A company tracks the number of defective products produced per day, , based on the number of hours a new machine has been running, . A scatterplot shows this data, and a line of best fit is drawn. The line of best fit can be modeled by the equation . What does the -intercept of this line represent in the context of the problem?
The number of defective products produced after 15 hours of machine operation.
The initial number of defective products produced when the machine begins operation.
The decrease in defective products for every hour the machine runs.
The maximum number of defective products that can be produced.