1. The best stage to plot the graph is after you have derived the function or equation you want to analyze. 2. This usually means after you have simplified the expression and found key features like intercepts, extrema, and asymptotes. 3. Plotting at this stage helps you visualize the behavior of the function clearly and verify your calculations. 4. For example, if you have a quadratic function $y = ax^2 + bx + c$, first find the vertex, axis of symmetry, and intercepts. 5. Then plot these points and sketch the curve to understand its shape. 6. Plotting too early, before simplification, can be confusing and less informative.