Horizontal Compression and Stretching and Reflection

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Horizontal Compression and Stretching and
Reflection
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Website

• http//orion.math.iastate.edu/algebra/sp/xcurrent/
  applets/horizontalstretch.html
• 21 on the list on the presentation page

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Objectives

• Students will explore
• A parent function and the effects of a constant
  a (where a is a real number)
• Horizontal Stretch and Compression of the graph
  of a function
• What value the constant a is when we see a
  reflection about the y-axis or origin
• For what values of a changes the graph

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Worksheet

• Blackline and Teacher Copy
• Answers should be the same for all odd functions
  and the same for even functions (but not the same
  for even and odd functions)

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Technology ideas

• Computer lab (if available)
• Show on TV screen, student watch and answer
  silently
• Project onto overhead screen

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Drawbacks

• Cant type in () to move function left/right
• Cant cut/paste into the equation line
• Cant delete entire function and type in own