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Topic:  Shodor lessons 
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Subject:  RE: Shodor lessons 
Author:  Mathman 
Date:  Feb 6 2006 
I've read thru the thread  interesting points. You might also
> like to try the Excel Graph Wizard, which is dead easy once you get
> the hang of it. (I've shown it to grades 5 and 6 for graphing
> experimental data )
>Enter your xy data set, highlight the lot,
> click on graph wizard, Use the XY scattergraph option, then follow
> the instructions.
That's OK, but graphs onl sets of points, and will not graph functions, or allow
for changing parameters other than intercepts, which change with the applet.
For example: y=a*cos(x) {a: 1,6,2} instantly produces three graphs for a = 1, 3,
5 [the last parameter in {1,6,2} is the step, 6 the upper bound.] Two parameters
are allowed.
There are other great graphing programs aside from relatively expensive symbolic
algebra programs, such as "Graph" from www.padowan.dk , or more at the U.
Kentucky Math Archives. Also, look perhaps into downloading the great free
OpenOffice suite for a suitable spreadsheet, and more.
Incidentally, if anyone is interested, I have done several spreadsheet
worksheets, one of which is the random setting of points on a grid for initial
exercises in naming points. I can't send it here of course, but would outline
the setup procedure.
David.
 
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