Drawing an arc

[djones1010]

Good day, I am having some trouble trying to a code an arc shape or a shape that looks like this: http://eqatwork.com/wp-content/uploads/2009/08/magnet.jpg

[billjarrold]

i just wrote some code to give you the y-values of basically any sort of parabola you want. i doubt that helps but i'd figured i'd offer to send it....twould be great if someone could critique it.

[djones1010]

Sorry for the late reply, I had a few other projects that were approaching their deadlines. That would be great. Thank you!