Online Graphing Calculators Have Replaced the TI-84 for Everything Except Exams

The last time I used a physical graphing calculator was during a proctored exam. For everything else -- homework, research, data visualization, function exploration -- a browser-based graphing calculator is faster, more capable, and free. The shift happened gradually, but by now the advantages of online graphing tools are overwhelming. What online graphing calculators do better Instant sharing. Graph a function and share the URL. Your colleague sees exactly what you see: the function, the window settings, the annotations. Try doing that with a TI-84. Multiple simultaneous functions. Physical calculators handle this, but the small screen makes comparing more than two or three functions painful. A browser on a laptop or monitor gives you a canvas large enough to display a dozen functions with clear color differentiation. Interactive parameter sliders. Change a coefficient and watch the graph update in real time. This is the single most powerful feature for building mathematical intuition