The purpose of this Screensteps is to create a Desmos eTool that consist of movable points which represents the Random Numbers.
For the eTool sample below, you will be instructed to select random point below the line to reveal its value. Once the point is moved above the line, it will then reveal the value.
Click on the link below to view a sample of Desmos eTool. For other examples of specialized Desmos eTools, click on the second link.
1. Click the link below to access the Desmos site.
2. Click the 'Sign-in' button (the 'Sign In' window will appear).
3. Click the 'Sign in with Google'.
1. Click the menu icon.
2. Click the 'New Blank Graph'.
1. Click the 'Untitled Graph' to rename the eTool title ('Save This Graph' window will appear).
2. Enter the title of your eTool.
3. Click 'Save' button.
1. Click the wrench icon to edit the graph settings ('Projector Mode' window will appear).
2. Modify your settings. For this demo, the following fields are unchecked: Grid, Axis Numbers, Y-Axis.
3. Optional: Add a label for your axis if desired.
4. Click anywhere outside the 'Projector Mode' window to close out the graph settings.
For the following steps, you will be creating two expressions for each point. The first expression is to set the location of the point when moved below the line. The second expression is set to reveal the value of the selected point once it is moved above the line.
1. Click the plus icon to add an item.
2. Select the item (expression, note, table, folder, or image) you want to add. For this demo, select 'note'.
3. Type the text you want to add on your 'note' (i.e. title of eTool, directions, etc.).
4. Click the plus icon and select 'folder'. All the expressions that will be created for the moveable points will be in the folder.
5. Type the name of the folder.
6. Click the plus icon and select 'expression' to create moveable point. Make sure that all added expressions will be in line with the folder.
7. Enter the first expression for your first point.
i.e.: "(a1,b1{b1<0)"
'a1,b1' - This will be the ordered pair which represents the location of the point. 'a1' is the x-axis and 'b1' is the y-axis.
'{b1<0} - The value of y-axis changes to less than 0 when the point is moved below the line. The point value will be invisible.
8. Click 'all' to add sliders.
9. Click the plus icon and select 'expression' to add value for the moveable point.
10. Enter the second expression for your first point. This will be the same ordered pair as the first expression but different conditional formatting.
You will be using '>' (greater than or equal to) symbol.
i.e.: "(a1,b1{b1>0)"
'{b1>0} - The value of y-axis changes to greater than or equal to 0 when the point is moved above the line. The point value will then be visible/revealed.
11. Click the Label checkbox.
12. Enter the value of your first point.
https://www.desmos.com/calculator/hvri5vmi3o
13. Repeat steps 6 through 12 to add more points.
