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Mathematics 16 Online
OpenStudy (anonymous):

Sophia is dilating a figure. One of her pre-image points with coordinates (-3, 5) has an image with coordinates (-9, 15). If one of the other image points has coordinates (3, 1), what are the coordinates of its pre-image point? (9, 3) (1,1/3) (1, 3) (-3, -1)

OpenStudy (shamim):

(-9,15) is a result of multiplying by 3 with (-3,5)

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