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Homework Help: I have a hard time recognizing transformations of functions.

  1. Oct 26, 2005 #1
    hello everyone

    can anyone give me any tips on recognizing compressions and expansions of functions? ie. vertical expansion, horizontal compression
  2. jcsd
  3. Oct 26, 2005 #2
    Look for invariant points.
    Example: if you are given a function that has been stretched in some way, but the points on the y-axis have not moved, you know it was a horizontal compression/expansion.
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