SLOPE AS A PROCEDURE: THE IMPACT OF AXIS SCALE

被引：0

作者：

Caddle, Mary C. ^{[1
]}

Earnest, Darrell ^{[2
]}

机构：

[1] Tufts Univ, Medford, MA 02155 USA

[2] Univ Calif Berkeley, Berkeley, CA 94720 USA

来源：

PME 33: PROCEEDINGS OF THE 33RD CONFERENCE OF THE INTERNATIONAL GROUP FOR THE PSYCHOLOGY OF MATHEMATICS EDUCATION, VOL 2 | 2009年 / 2卷

基金：

美国国家科学基金会;

关键词：

D O I：

暂无

中图分类号：

G40 [教育学];

学科分类号：

040101 ; 120403 ;

摘要：

This paper examines an episode in which a group of students represented a linear function using more than one graph. The episode shows the students' ideas about slope as a procedure to be enacted versus the understanding of slope as a property of the function. This is illustrated through a disagreement about the value of the slope for a particular function. Those students' using only a procedural understanding of slope faced challenges when confronted with a different graph of the same Junction on which the scale of the coordinate axes had been changed. This highlights how the procedural understanding of slope places great importance on choice of scale, and shows the value in examining graphs of the same function at different scales.

引用

页码：233 / +

页数：2

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