"Distance from..." graphs At G.C.S.E level (England), there are still some questions knocking around about "distance from.." graphs as opposed to "distance travelled .." graphs. The first can go down as well as up, as the person returns to their starting place, while the second can only increase. These questions are often presented in the form of journeys, with horizontal parts of the graph presumably meant to represent rests, and sometimes questions about distance travelled, speed etc. It seems to me, however, that these graphs are not defined. Is 'distance from' as the crow flies or distance travelled from in a straight line? If it is the first, the horizontal part of the line could represent the person travelling along an arc of a circle, the centre being their starting point. Also, you could tell nothing about distnce travelled. The person might be travelling along a spiral route, travelling a long distance but only getting gradually further away from their starting point. Am I right in complaining about these "distance from.." graphs, or are there set conventions that define them? Thanks in anticipation.