We are given two triangles △RST and △R′S′T′. We are to determine which of the following choices are both triangles congruent to each other. The only choice which is true in this case is:
E) (x, y)→(0.07x, 0.07y)
This is possible since if we look at the coordinates of the second set of points, we can conclude that the scale factor used is 0.07.