Defining Slope. Identifying positive, negative, zero and undefined slope. Calculating slope from a graph and from a table. Includes a simple song that I made up to help my students remember to put the RISE on top and the RUN on the bottom. Many students have told me they sing it to themselves during quizzes and tests, and quite a few former students have told me they still remember it and use it in high school. My students loved it when I had them sing it in a round, boys vs girls, or left vs ri