- Set up an account so you can save your graphs. I suggest making up a username and password that you can easily remember and type when you go to class, and not linking to your google account or using the same password that you use for more sensitive things. You can see my public graphs at https://www.geogebra.org/u/clzirbel
- To save an infinite resolution image, I have had better luck with the "GeoGebra Classic" interface.
- To get GeoGebra Classic, use the links in the previous lines, or click the three-line menu in the upper left, then Apps, then GeoGebra Classic.
- Make your graph
- To download as SVG, click the 3-line menu on the top of the window, Download As, SVG. You can check the appearance of an SVG file by opening it in Chrome.
- To convert SVG to EMF, use the CloudConvert site to convert SVG to EMF. If you run out of free conversions in a given day, you can set up an account, it's pretty easy.
- Insert the EMF file into Word, or copy and paste into Word from file explorer.
- The problem I had with non-Classic GeoGebra is that when I exported to SVG, the axes and grid lines disappeared. That's not cool!
- Note about graph proportions: By default the graph window is wider than it is tall. If you want different proportions, click and drag the input window (on the left) to change the size of the graph window.
- Example: blank grid from -10 to 10 on x and y axes. GeoGebra sheet. SVG file. EMF file.
- To graph a function, type something like f(x) = sin(x). In non-classic GeoGebra, dots for local maxima and minima and for axis intercepts will be shown. Right click on the graph to make them go away, left click to bring them back. In GeoGebra Classic, these points are not shown.
- To rescale one axis, press and hold Shift and then click and drag on the axis.
- GeoGebra typically has too many grid lines for my taste; it has both major and minor grid lines. You can turn off the major grid lines by clicking the settings icon, or in Classic, the lower 3-line menu and adjusting the grid.
- To graph a piecewise function with two intervals, type something like f(x) = If(x<0,x^2,1+x). See the graph with two pieces. To graph a piecewise function with three intervals, type something like f(x)=If(x<0,x^(2),If(x>1,3-x^(2),1+x)). See the graph with three pieces. GeoGebra will format your If expression nicely to display the inequalities for you. You will need to think carefully about what inequalities to type!
- To add an open or closed circle to the graph, you can simply define a point by typing A=(0,1).
- In Classic GeoGebra, to make the point closed, right click the point, Settings, Color, and choose black. Close that menu by clicking the X. To make the point open, make the color white; it will have a black outline. To get rid of any text label, right click the point, uncheck Show Label.
- In non-Classic GeoGebra, to make it closed, click on the point, then click the circle icon, then choose the closed circle symbol, then click the point again, click the paint can, and click black or another dark color. To make the point open, click the point, circle icon, closed circle icon, then click the point again, paint can, + symbol, and choose white from the large color palette. The circle will be outlined in black but white in the middle and will cover up the graph there, as you need for an open endpoint.
- It might be helpful to add a slider so that users can change a variable on the fly. Piecewise function with a slider that controls one piece.
- To graph data points in GeoGebra Classic:
- See this video for excellent instructions: https://youtu.be/aeV1gjd2o-U However, some small details differ from one version of GeoGebra to another, so my instructions below may be helpful.
- Above the place where you can enter a function, click the small 3-line menu button on the right
- Click the three vertical dots
- Click Spreadsheet, this should open a spreadsheet of cells
- Use columns A and B to enter your X,Y data
- Select all the cells you want to plot
- When you select cells, an icon with {1,2} should appear, click that, then select List of Points
- You can rename the list if you want, and you can switch which column is X, which is Y
- To add a regression line, highlight the data points in the spreadsheet again, then click the icon that looks like a histogram, then Two Variable Regression Analysis
- This opens up a new window, which might need to be resized. This is a place to experiment with different models, linear, quadratic, etc.
- Once you're done making a model, click the icon that is a square with an arrow to either export as a PNG or Copy to Graphics View. That is the better option to make an SVG output file.
- Adjust the main graph window, then export as SVG.
- Linear regression SVG. Linear regression EMF.