![]() If somebody reading this has any advice that could help me become more effective with using Desmos or Geogebra for this purpose, please email me at or find me on Twitter **Update! See below for additional support on Desmos use. ![]() This approach eliminated the x-axis issues from the improper syntax I used at first. These graphs show some of the thinking I do day-to-day as a mathematics teacher trying to construct examples to display in class and problems to use in assessments. ![]() Here is the corrected syntax I typed into the Input Bar to define f(x), g(x), and h(x): I went to Youtube and found a video on graphing piecewise functions in Geogebra:īelow is an image of the corrected Geogebra graph using the appropriate If commands to define the rules f(x), g(x), and h(x). I knew from experience I could clean this issue up by using Condition to Show Object in the Object Properties menu if I had to, but I couldn't remember exactly how. I incorrectly assumed the syntax would be similar to that of Desmos. Here is the exact syntax I typed into the Geogebra input bar for each of the above pictures. here are the three functions shown individually. Pictures are, after all, worth a thousand words. Each function has a default y-value of 0 for values of x outside the restriction. Using similar syntax, I had a problem with the restrictions in Geogebra. Here is the same graph I made using Geogebra:Īfter making the graph in Desmos, I assumed I could use similar syntax to make the graph in Geogebra. To clean up the image, one thing I could try is modifying the restriction on x so the user does not see the part of the function jutting into the circle shown at the left. The circle centered at (1, 1/3) with radius 1/10 is my effort to place an open circle on the graph. The way to make these curves denser was not immediately obvious to me. A photocopier may not pick up on the sections of the function on the graph given the lack of density (being able to make the segments and curves thicker). When I wasn't sure what to type, I browsed the examples of projects submitted by Desmos users found on the Desmos homepage. Ideally, I want to capture this graph and place it on an assessment. ![]() I typed <= and the editor automatically generated the less than or equal to signs for the restrictions on x. I am sharing my thinking about this task.)Īs I typed the function syntax into Desmos, I thought the editor was a little more user friendly than Geogebra. I want to see what the differences are between the programs to figure out when to use each of these powerful tools to enhance my instruction in mathematics. I have much more experience with Geogebra than with Desmos. The purpose of this post isn't really to pit Geogebra and Desmos against one another rather, I want to make note of some of the things I was thinking about as I tried to make a piecewise function graph in each program. I was trying to write an item for an assessment where I would give a student a graph of a piecewise function and ask them questions about the domain, range, and to evaluate the output value for a specific input value - for example, find f(-3). ![]()
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