How do I create a Desmos parabola by focus and directrix item?
In Mastery Connect, if your institution has a paid Desmos upgrade, you can create a parabola by focus and directrix item. A Desmos parabola by focus and directrix question requires students to graph a parabola by moving points that control the focus and directix. After you select the question type, you can use the math editor to add details for the question, view a student preview, and validate answers.
- If you do not see the Desmos Items (Paid Upgrade) section in the Question Type drop-down menu, your institution does not have a paid Desmos upgrade.
- District and school administrators (admins) can also create items directly in the district item bank.
Open Item Bank
In Global Navigation, click the Assessments link , then click the Item Bank link .
Add Question Title
Enter a title for the question.
Select Parabola by Focus and Directrix Question Type
Click the Question Type drop-down menu , and select the Parabola by Focus and Directix option .
Following the steps to create an item, add item details and continue.
Note: If you do not see the Desmos Items (Paid Upgrade) section in the Question Type drop-down menu, your institution does not have a paid Desmos upgrade.
To add question details, type in the Compose question field . To add math equations and expressions, click the Add Math icon  and use the options to enter the expression details.
Set Example Answer
To set an example answer, click and drag the points of the parabola to the correct positions.
To adjust the question parameters, select options from the question properties .
To view additional question options, click the More options drop-down menu .
Modify Graph and More Options
In the Modify Graph section, click and drag the points to create a graph for students to start with when answering the question . You can modify graph settings, expressions, and parameters.
To define parameters for the graph, type in the Expression fields .
To adjust font size, click the font size menu and select a size option .
To preview the item interaction, click and drag the points .
The number of points awarded for the item as answered in the preview window over the number of points possible display in the scoring bubble .
To view correct and incorrect answers, click the Show Answers checkbox . Correct answers display a check mark and are shaded green. Incorrect answers display an X and are shaded red. If an answer is incorrect, the correct answer displays beneath the response and is shaded yellow.
Add Optional Features
To add optional features to the item, click the Add Feature button  and select the features you wish to add from the drop-down menu . Learn more about adding passages and other features.
Note: The Desmos calculators are only available in districts that have paid Desmos subscriptions.
Save or Publish Item
To save the item as a draft and keep editing enabled, click the Save As Draft button . When you save an item as a draft, it can be edited and deleted in your personal item bank and by admins in the district teacher item bank.
To disable editing and share the item with teachers in your district, click the Publish button . When you publish an item, it displays in the district teacher item bank and is available to all users in your district. You can delete the item from your personal item bank, and admins can delete the item from the district teacher item bank.
To disable editing and share the item with admins only, click the Publish & Reserve button . When you publish and reserve an item, you can delete it in your personal item bank, and admins can view and delete the item in the district teacher item bank.
To delete the question and return to the Create New Item page, click the Go Back button .