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.
Direct Quotations. Direct quotations involve incorporating another person's exact words into your own writing. 1. Quotation marks always come in pairs. Do not open a quotation and fail to close it at the end of the quoted material. 2. Capitalize the first letter of a direct quote when the quoted material is a complete sentence.