The Quicktime movies show a transformation being applied to some blue dots and a second transformation applied to the resulting green dots. [The second movie includes a TRACE of the moving points.]
The task is similar to Task (A), with one of the centres moved slightly. When you have solved both tasks, see whether you can discern a pattern relating the centres of the two initial transformations and the centre of the resultant transformation.
The task is quite challenging. Play the chosen movie several times and PAUSE it at key moments.
The Worksheet shows a still image from each movie, at the moment when the transformations have been completed.
NOTE: If needed, you can download a free copy of the QuickTime movie player from here: