File talk:Divmod.svg

This is not a graph of a function, at any of the multiples, there are numerous answers, anywhere along the line. Take the example, of a mod n, at a=n. What is the quotient and remainder? The graph has all the values from 0 to n, indicated by 2 vertical lines. This repeats throughout in a similar pattern. The graph of a function should not have any vertical lines, as it gives multiple y values for any x value. Furthermore, the end points need to consist of either an open circle or a closed circle, so at any x value, there is either the line, or a closed an open circle.