About the image
I'm wondering why the image is labeled Figure 1. The style of this course, at least in my reading so far, has been to refer the reader to images using location words (e.g., at right). If we want to use a Figure number here, I'd suggest evaluating other images for labeling as figures....and then there are others which are included for interest and wouldn't be labeled figures. Just something to consider.
Also, I think the page layout could be improved by moving the image to the right of the text.
Alison
Agreed, the use of Figure number here is not consistent with the remaining materials. I've removed the Figure number (less work than revisiting all the other images ;-)).
The centred placement of the image is to facilitate display on mobile devices. Images wider than 320px can be problematic on portrait mobile phone layouts - we're still working and thinking about optimising images for mobile devices in the course snapshots. For now, the centred is a temporary solution.
