I created this interactive excel file to make it easy to practice finding vertical asymptotes and holes, horizontal asymptotes and end behavior, as many times as you need to for rational functions problems, so that when it comes time to graph, finding the key features is automatic. It creates a random problem to find the end behavior or find the vertical asymptotes and holes, and once you have your solution, you scroll down to check your work. It includes a tab for finding vertical asymptotes a