Dilations and Scale Factors

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Dilations and Scale Factors
Bellringer Page 505/ 41-43

• Agenda
• Review test
• Bellringer
• Review homework
• 504/ 31, 33
• Homework

• The small opening in the center plate.
• The scale factor is negative because the image is
  inverted.
• The image is inverted because the light from
  point A travels
• in a straight line to the image of A the
  light from point B
• travels in a straight path to the image of
  B and so on for each
• point on the preimage.

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Homework Answers
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Homework Answers
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Guided Practice 31
A point and a scale factor are given. Find the
line that passes through the preimage and image,
and show that this line contains the
origin. (5, 1) n4
First, find the image of the point (20,
4) Second, find the slope through the line
Then use y mx b to get
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Homework
Worksheet 8.1