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.
Data such as the time, date and place, and the reason for the examination. Detail the nature and extent of your involvement in the case. A brief account of the alleged offence and the sources of that information should also be included. It is often useful to quote verbatim the subject's account of critical issues.