(*^

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:[font = special1; inactive; preserveAspect; ]
                                                      Boyle's Law

The cell below contains sample volume and pressure data for this module.  You can use this data or, better yet, data that you collect yourself.  The cell below draws a graph showing this data.  Evaluate it now.

;[s]
4:0,1;65,0;261,2;277,0;279,-1;
3:2,13,9,Times,0,12,0,0,0;1,13,9,Times,1,12,0,0,0;1,13,9,Times,1,12,65535,0,0;
:[font = input; preserveAspect; ]
Clear[Data]

Data := {{20,  .336},
         {19,  .358},
         {18,  .375},
         {17,  .397},
         {16,  .425},
         {15,  .453},
         {14,  .487},
         {13,  .549},
         {12,  .560},
         {11,  .638},
         {10,  .666},
         { 9,  .733},
         { 8,  .840},
         { 7,  .924},
         { 6, 1.036},
         { 5, 1.192}}
         
 ListPlot[Data, PlotRange -> {{0, 20}, {0, 1.5}},
                PlotStyle -> {PointSize[0.02], 
                              RGBColor[0, 0, 1]}]
:[font = special1; inactive; preserveAspect; ]
The next cell superimposes a graph of the function

                                                        P(V) = 20 * 0.336 / V

on top of the data.  Evaluate the cell now and notice how well the function fits the data.
;[s]
5:0,0;108,1;129,0;152,2;220,0;222,-1;
3:3,13,9,Times,0,12,0,0,0;1,13,9,Times,1,12,0,0,0;1,13,9,Times,1,12,65535,0,0;
:[font = input; preserveAspect; ]
Clear[DataGraph, FunctionGraph]

DataGraph = 
    ListPlot[Data, PlotRange -> {{0, 20}, {0, 1.5}},
                   PlotStyle -> {RGBColor[1, 0, 0],
                   PointSize[0.02]},
                   DisplayFunction -> Identity];
                   
FunctionGraph =
    Plot[20 * 0.336 / x, {x, 5, 20},
                   PlotRange -> {0, 1.5},
                   PlotStyle -> {RGBColor[0, 0, 1]},
                   DisplayFunction -> Identity];
                   
Show[DataGraph, FunctionGraph,
                   DisplayFunction -> $DisplayFunction] 

^*)