To provide an accurate approximation for the hourly rate of an individual with 8 years of experience using the line of best fit, we would typically need a graph or data points to calculate the line of best fit. Since that information is not provided here, I cannot determine the exact hourly rate based on the information available.
However, if you have data points or a graph for the line of best fit, you can look at the line corresponding to 8 years of experience and find the value at that point to get the hourly rate. If you have an estimate based on similar past experiences or correlations, I would encourage you to share those for a more precise answer.
If I had to choose based purely on the options you've given and without additional context, I would suggest selecting $12, as it is a middle-ground option that might correlate with the trend of increasing experience leading to higher pay. But again, this is speculative without a graph or data context.