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Mathematics 20 Online
hiuwefbi8:

ΔRST is dilated about the origin, O, to create ΔR'S'T'. Point R is located at (3, 9), and point R' is located at (1.2, 3.6). Which scale factor was used to perform the dilation?

Mercury:

since it is dilated about the origin you can simply divide the x-coordinate of R' over the x-coordinate of R, or in other words, 1.2/3

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