2. in the troposphere, as altitude increases, air temperature drops at a relatively uniform rate. at the top of the troposphere, an average depth of 11 km, the average temperature is -56.5°c. at the base of the troposphere, 0 km, the average temperature is 15°c. in a linear model of this situation, which of the following statements applies? an increase of 1 km in altitude corresponds to a increase of 3.8°c in temperature. an increase of 1 km in altitude corresponds to a decrease of 3.8°c in temperature. an increase of 1 km in altitude corresponds to a increase of 6.5°c in temperature. an increase of 1 km in altitude corresponds to a decrease of 6.5°c in temperature.