The table below represents the atmospheric temperature at a location as a function of the altitude: Altitude (in thousand feet) x Temperature (in °C) f (x) 15 4 20 −6 25 −16 30 −26 The average rate of change of the function between x = 15 to x = 25 is degrees Celsius per thousand feet and represents the rate of change of temperature per thousand feet. (5 points)