Should trivial scales be shown?

[Fil]

If you have 1 dot, or as in https://observablehq.com/d/49758b3252c58f13 many arcs centered on the origin (0,0), should we display the axes at all? Currently one has to actively decide not to show them.

[mbostock]

Yes, I think this is the right default. I think the issue with #85 is that the default x and y values are constant(0). I don’t think we want that — I think we want x and y to be undefined by default, so there’s no associated x and y scale (unless there needs to be one).