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# Dilations question

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what is the scale factor using points R(3,9) to R'(1.2,3.6)?

May 5, 2020

$$\frac{3}{1.2} = \frac{30}{12} = \boxed{\frac{5}{2}}$$
to check, we can do the same thing with the $$y$$ values:
$$\frac{9}{3.6} = \frac{90}{36} = \frac{15}{6} = \frac{5}{2}$$