From: Jan Tremain
To: Teacher2Teacher Public Discussion
Subject: graphing discrete vs. continuous data
Suppose you are counting by ones on the x axis. If the label is cars it wouldn't make sense to connect the dots because you can't have 1 1/2 cars. If it is time, it makes sense because you can have 1 1/2 minutes or seconds . However, I tell students sometimes we connect the dots because it is easier to make predictions and see patterns when they are connected even if sense-wise they shouldn't be. I also teach CMP. I suggest you email the authors at Michigan State with your question.
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