| Posted: 8/21/2014; 11:14:43 PM
Yes, Steve, you can enter the parametric equations of a line (or any other space or plane curve) using the Add a Space Curve option on the Graph menu on the CalcPlot3D menu bar.
I did not give a way to enter the symmetric equations of a line, but perhaps you can tell me where they are useful and it could be a possibility. I teach them so students can handle problems with this form, but I have not yet found a place I would actually call them useful. Please let me know if you have found a good reason for using this form.
Thanks for the post, Steve!