Students must be able to relate many representations of slope to form an integrated understanding of the concept.

Contributor Notes

Courtney R. Nagle,, is an assistant professor of mathematics education at Penn State Erie, The Behrend College. She is interested in the development of mathematics concepts, including the notions of slope and limit.

Deborah Moore-Russo,, teaches in the Graduate School of Education, State University of New York (SUNY), University at Buffalo. Her primary research interests include spatial visualization, communication, and reasoning.

(Corresponding author is Nagle
(Corresponding author is Moore-Russo
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