U.S. Standard Atmosphere

The United States Standard Atmosphere measures the average temperature and pressure of the atmosphere at a given altitude. The information displayed in the graph below is for the pressure (measured in millibars or mbs) and the temperature in degrees Celsius. Determine the equation of the line that best fits the data points.

Using that equation, what is the temperature at a pressure of 500 mb?

What is the pressure at a temperature of five degrees Celsius? Verify your results on the graph by graphing the two points you have just found on the line.

Explain in words what information this graph is conveying.