How to graph functions with removable discontinuity using some software?

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I find it difficult to graph a function with a removable discontinuity accurately using WolframAlpha or TI Calculators. Virtually all software that I am aware of would graph the function $f(x)=\dfrac{x^2}{x}$ as a continuous function. Even using TikZ package with latex, I do not know how the system will take care of the removable discontinuity automatically (though this part of the question should be asked here). Any suggestions?

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Yes. Plot a bunch of points and draw curves between them. https://www.printablepaper.net/category/graph