Answer:
(0, 28)
Step-by-step explanation:
dilation means like "projection".
like when you have a projector at home or at school and watch a movie or so on a projection screen.
the father away from the projector, the bigger the picture. and, with a zoom lens this scaling factor (how much bigger) can be changed.
now when it says here that the points of the rectangle are dilated (or projected) with scale factor 7 from the origin (0, 0), it just means the projector light bulb is at (0, 0).
the images to be projected are at the QUAD coordinates.
and the protection screen is 7 times farther away from the projector light bulb than the original images.
so, U' = (7×0, 7×4) = (0, 28)
