To determine how fast Chandra runs each mile according to the line of best fit, we would typically look at the slope of the line in the scatter plot that represents her running times at each checkpoint. Since I do not have access to the scatter plot or specific data points, I cannot calculate the exact value.
However, you can estimate this based on the provided answer choices. If you know the total time it took her to run the 10 miles, you can divide that total time by 10 to find her average time per mile.
If you find that she took, for example, 100 minutes to run the 10 miles, you would calculate:
100 minutes / 10 miles = 10 minutes per mile.
Then, based on your calculations or observations from the scatter plot, you would match the result to one of the given options.
If you have specific timing data or details from the scatter plot, I can help you deduce the right answer from those figures. Otherwise, please refer to the scatter plot to assess the average time per mile systematically.