E'F has endpoints located at E'(1, 0) and F'(1, 3). segment EF was dilated by a scale factor of one half from the origin. Which statement describes the pre-image? segment EF is located at E (0.5, 0) and F (0.5, 1.5) and is half the size of segment E prime F prime. segment EF is located at E (1, 0) and F (1, 3) and is the same size as segment E prime F prime. segment EF is located at E (2, 0) and F (2, 6) and is twice the size of segment E prime F prime. segment EF is located at E (3, 0) and F (3, 9) and is three times the size of segment E prime F prime.

Question

Mercury · Answer

the pre-image was dilated by a scale factor of 1/2 to get the image

so to go from the image to the pre-image, work backwards, and dilate the image by 2 to get the pre-image

since we're dilating from the origin, you can simply take the coordinates of E'F' and multiply by 2