Triangle j′k′l′ shown on the grid below is a dilation of triangle jkl using the origin as the center of dilation:

two triangles on a grid. first triangle has vertices j 4 and 6, k 2 and 4, and l 6 and 3. image triangle has vertices j prime 8 and 12, k prime 4 and 8, l prime 12 and 6.

which scale factor was used to create triangle j′k′l′?

4
2
one quarter
one half