For some reason the desmos engine doesn't do mod(x,3)=0, perhaps it's graphing an infinately small point. If you allow the value of the modular function to be less than a small number, say, mod(x,3)<0.01, then you will see the points you expect.
Verbatim is defined as an exact repetition without changing the words. An example of verbatim is when you quote someone exactly without changing anything. word for word; in exactly the same words. Origin of verbatim.
In haec verba Definition: Latin: verbatim. More properly rendered in hÃ¦c verba. and sometimes, just hÃ¦c verba. Words which are verbatim. A court would use this term to refer to evidence, for example, that was tendered to be in hÃ¦c verba. For example, in a slander action, one must reproduce the exact alleged defamatory words in haec verba.