n Learning and Teaching Mathematics - Straight to the point

Volume 2012, Issue 13
  • ISSN : 1990-6811


It is always nice when an idea for a task comes from a member of the class (Silver, 1994; Kilpatrick, 1987). I had asked Year 7 students to draw several graphs of the form = + , where and are constants, choosing for themselves what values to use for the constants. The idea was to look for the effect of and on the shape of the graph. Making the link between the form of an equation and the appearance of its graph is something that is reported as being difficult (Knuth, 2000a, 2000b).

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