Stage 20 · Coordinates & First Functions

20.3.3 The Scale Factor and Its Sign

20.3 Similarity and Scaling in Coordinates

Point 3 of 4

20.3.3 The Scale Factor and Its Sign

Core idea

A positive k enlarges in the same direction, while a negative k also flips the picture over to the far side of the origin.

Module goal. Use whole-plane scaling to understand enlarging and shrinking a shape, and see clearly what multiplying by a ratio means geometrically

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