When you have a rational function, such as: 3x-5/x-1 After attaining things like the x and y intercepts and asymptotes, how do you know how many "pieces" of the graph there are? With linear functions/equations, you know it's a single line. Even quadratic graphs are a single piece - albeit a parabola. But with these rational type of functions/equations, there can sometimes be multiple pieces to graph. How do you know how many there are?