From: J Leckman <juliesgotmail1@yahoo.com>
To: Teacher2Teacher Public Discussion
Date: 2010090501:27:38
Subject: Re: Graphing

Yes it is correct.  The reason the bar graph works is you are
measuring the distance of a roll.  The roll is a discrete piece of
data.  You can not have one and a half rolls.  You either roll or you
don't.  You have the distance of the roll itself.  So roll three that
traveled 3 feet is one discrete piece of data.  

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