(*^

::[	frontEndVersion = "Macintosh Mathematica Notebook Front End Version 2.1";
	macintoshStandardFontEncoding; 
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	fontset = header, inactive, noKeepOnOnePage, preserveAspect, M7,  12, "Times"; ;
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:[font = special1; inactive; preserveAspect; ]
                     Derivatives -- Determining the Derivative as a Limit

The following cell reminds you of the syntax for the Mathematica   Plot  procedure that you will want to use to draw graphs for this module.  Evaluate the next cell now.  The specification AspectRatio -> Automatic  causes Mathematica  to draw the graph so that one physical unit on the x-axis represents the same change in x as one physical unit on the y-axis represents for y. 
Notice that the graph of the first function listed is drawn in red and of the second function in blue. 
;[s]
12:0,3;73,0;128,2;139,0;142,3;146,0;217,1;246,0;264,4;288,0;297,2;309,0;558,-1;
5:6,13,9,Times,0,12,0,0,0;1,13,9,Times,1,12,65535,0,0;2,13,9,Times,2,12,0,0,0;2,13,9,Times,1,12,0,0,0;1,13,9,Times,1,12,65535,0,65535;
:[font = input; preserveAspect; ]
Plot[{x^2, 2x}, {x, -1.0, 1.0},
AspectRatio -> Automatic,
PlotStyle -> 
   {{RGBColor[1, 0, 0]}, {RGBColor[0, 0, 1]}}]
;[s]
3:0,0;32,1;58,0;119,-1;
2:2,12,10,Courier,1,12,0,0,0;1,12,10,Courier,1,12,65535,0,65535;
^*)