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.
1. an expression whose meaning is not predictable from the usual grammatical rules of a language or from the usual meanings of its constituent elements, as kick the bucket âto die.â. 2. a language, dialect, or style of speaking peculiar to a people. 3. a construction or expression peculiar to a language.