How will a scale factor affect a figure—negatively? Using a grid, the narrator of an engaging video performs a dilation with a negative scale factor. The presenter compares a positive scale factor with a negative scale factor to explain what happens to the position of the transformed object. The resource describes the transformation using a given figure and its enlargement, 

Concepts

scale factors, dilation, dilations, negative numbers, transformations

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Additional Tags

math

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Instructional Ideas

• Use the ray method to show why the figure is reversed with a negative scale factor
• Make a connection between negative scale factors and rotations

Classroom Considerations

• Individuals should understand how to perform basic dilations/enlargements

Pros

• Provides several opportunities for practice
• Includes templates to perform the dilations

Cons

• None

Common Core

8.G.A.3 HSG-CO.A.2 HSG-SRT.A.1.a MP1 MP6