Is it possible to get Lisa's PREIMAGE and IMAGE to lie perfectly on top of each other? Move the line and/or preimage around and see if you can do this!
See if you can do this same thing again. Yet this time, get it to look ENTIRELY DIFFERENT from what you have above!
Under what condition(s) will Lisa's image lie on top of her pre-image? Try to describe as best as you can in your own words.