Triangle J′K′L′ shown on the grid below is a dilation of triangle JKL using the origin as the center of dilation: Which scale factor was used to create triangle J′K′L′? 1 by 3 4 3 one quarter

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Triangle J′K′L′ shown on the grid below is a dilation of triangle JKL using the origin as the center of dilation:

Which scale factor was used to create triangle J′K′L′?
1 by 3
4
3
one quarter

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answer: it is c.) 2 I checked that I got it wrong when I added 1/2. I thought it was d but it was not.