I have a TI-83 graphing calculator and am thinking about upgrading

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Weave
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I have a TI-83 graphing calculator and am thinking about upgrading to the 89 because extra useful features. Is it worth it?
 
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There have been several discussions regarding the choice of a calculator. I recommend that you do a search on the forums. Also the type of calculator you want depends what you intend to do with it.