United States Standard Atmosphere

The United States Standard Atmosphere is displayed below as a function of altitude (km) versus pressure (mb) and as a function of temperature (°C) versus pressure (mb). Determine the equation of the line for both graphs. Use these two equations to determine the equation that describes the temperature as a function of altitude. Graph this new equation. Using that equation, find the temperature at altitudes of 3 km and 7 km. At what altitude would you expect the temperature to be 0 degrees Celsius?