The scatterplot shows the temperature, in degrees Fahrenheit (${}^{\circ }F$), and the distance above sea level, in feet, measured at 6 locations on Mount Jefferson. A line of best fit is also shown.

The x-axis represents distance above sea level, and the y-axis represents temperature.
One of the data points represents a measurement taken at 6,000 feet above sea level. What is the absolute difference between the actual temperature measured at 6,000 feet and the temperature predicted by the line of best fit at that same distance?