If the dilation Dk (-2,4), equals (1,-2), the scale factor k, what is the scale factor?

1 Answer

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rcmath | High School Teacher | (Level 1) Associate Educator

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k*(-2,4)=(-2k,4k)=(1,-2) =>

-2k=1 => k=-1/2

check:

4k=-2=>k=-2/4=-1/2

Thus k=-1/2