How to Graph With an Online Calculator
When it comes to algebra and trigonometry, a graphing calculator is an invaluable tool. The problem is that many of them are pricey, and if you're only taking one or two classes, you may not feel the cost is justified. Fortunately, there are a number of free online applications that work just as well as anything you can buy.
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Instructions
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Plotting Equations
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1
Select a graphing calculator tool that works well for you. A couple of options are listed in the Resources section of this article. The My HRW option looks great and works well, but choose one that you like and that has the functions you need.
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2
Set the limits of the graph to fit your needs. There should be text boxes for both X and Y Maximums and Minimums. If they are not on the main window, they may be on a settings tab, depending on your calculator.
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3
Input your equation or equations into the input panel, usually labeled "y=" next to an empty text box. Use the website's function buttons and the number keys on your keyboard to type in the equation.
If you have multiple equations to graph, and multiple input boxes, type those into other input boxes.
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4
Press the "Graph" or "Calculate" button. Depending on the website you're using, your graph may appear with or without a page change.
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5
Use the calculator's functions to move around the graph or zoom in or out to the size and shape that you need.
Plotting Points
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6
Select the graphing calculator that will suit your needs. Again, there are a couple of options in the Resources section, and the My HRW calculator is a very solid choice.
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7
Set the limits of your graph again. Remember that on some websites, the settings may not be immediately on the page, and may instead be on a separate tab.
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8
Find the plot points tab or text boxes and input the points you have into the calculator.
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9
Press the "Graph" or "Calculate" button.
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10
Move around and zoom the graph to the best location for your needs.
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Tips & Warnings
Some calculators have functionality that allows you to find intersection points or lines of best fit. You may have to try a few calculators before finding the one that does everything you need it to. There are plenty of options, so don't stick to a calculator that you dislike or that lacks an important function.
