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Mathematics 8 Online
OpenStudy (anonymous):

Which description matches the transformations y=cosx undergoes to produce y=3cos(-2x)? A. Horizontal compression by factor 1/2, vertical stretch by factor 3, then a reflection through the y-axis B. Horizontal compression by a factor of 3, vertical stretch by factor 2, then a reflection throught the x-axis C. Reflection through the y-axis, vertical shift of 2 units, horizontal shift right by 3 units D. Horizontal shift left 2 units, then vertical shift up by 3 units

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