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

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### 1 Answer

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

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

check:

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

Thus **k=-1/2**

*print*Print*list*Cite

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

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

check:

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

Thus **k=-1/2**

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