Those numbers are rounded to one decimal place. Given the trendline, it's far more likely that the actual numbers were 10.63, 10.58, 10.34, 10.26 rather than 1

Those numbers are rounded to one decimal place. Given the trendline, it's far more likely that the actual numbers were 10.63, 10.58, 10.34, 10.26 rather than 10.6, 10.6, 10.3, 10.3.