A Great Tool for Graphing
WARNING: Math-related content! Handle with care!..
My math teacher in high school was really good at drawing figures and graphs. He could draw a circle almost perfectly with only one move. Though my drawing is good, I am not as good as him. Especially, I have a hard time when it comes to drawing accurate graphs in the class. By the time I started suspecting if a ruler might help, I discovered this website; GraphSketch.com.
It is extremely handy if you teach how to graph functions. You can use this website to draw your graphs accurately for hard-copy worksheets, or to draw your graphs while teaching, or to have images of the graphs for your ShowMe’s.
When you go to the website, what you see is a coordinate plane. If you scroll down, you see the parameters. Here, you can type up to 6 functions, each graphed with a different color, adjust the size of the coordinate plane, display the numbers on the axes according to your choice, adjust the thickness of the graph, and even the size of the image!.. I can write a long paragraph for each setting, but it is always the best when you explore yourself.
At the bottom of the page, you may see the table for assistance on how to write certain type of functions. This is really helpful as the website doesn’t have a tool to type mathematical symbols, like the powers or the square roots, etc.
And the best part is, you can either save your graph, or get a “permanent link”. To save your graph as an image, click on the link just under the coordinate plane, and then save the image as usual. To get a permanent link, just right click on the “permanent link to this graph page” and click on “copy link location”. Then you can share the graph by sending this link via e-mail or pasting it to your website, etc.
I really enjoyed using Graphsketch in teaching graphs of radical functions. I no longer draw graphs with color pens on the board, which actually are ‘sketches’ rather than accurate graphs. I can graph several functions in Graphsketch, but “three is a crowd” in my manually drawn graphs. Moreover, I save time; typing the function is all that I have to do. And here is how I used this amazing yet simple tool in my ShowMe. You can compare my manually drawn graphs to the ones drawn with Graphsketch.
My students also liked the website. Actually, it is a good way for them to discover the nature of the graphs of functions. They can start with a parent function ( y = √x, in my case), and then insert numbers and four operations to realize the graphing process, understand the transformations, or compare the graphs of different functions, etc.
If I was asked to improve it, I would add “percentage” option for changing the size of the image. This is a good option if you want to change the size but keep the scale of width and height of the image. Also, I’d like it to draw graphs of implicit functions, as well, but I think this option is way too harder to add than the percentage option.
For the ones who dare to read this article until here, feel the relief; it is over. Thanks for your patience.