Find an expression for the function (defined by you) that expresses the average rate of change of pressure with respect to altitude in terms of the altitude, the changes being relative to the pressure of 800 atm at an altitude of 4700 meters. Include the proper domain. Then use desmos to graph the function over this domain. Adjust the viewing window so that the graph fills most of the page. Be sure to label the axes with units and the appropriate variable names. Include a screenshot.