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.
Indirect Quotations. Indirect quotations are not exact wordings but rather rephrasings or summaries of another person's words. In this case, it is not necessary to use quotation marks. However, indirect quotations still require proper citations, and you will be commiting plagiarism if you fail to do so.