Graphs in multiple choice question

[Martin Jones]

I was looking into a question where the student needs to select the correct graph of a given function, but it is not working.

I used the syntax {graph} in the choice but it shows blank

I then tried $\var{graph}$ and it shows as in attached screenshot.

[Christian Lawson-Perfect]

Do you reuse the graph somewhere else, such as the advice? An HTML element such as a graph can only appear once in the question. If you want the same graph multiple times, often the best thing is to copy the code from the variable definition to a function, and use that to make a new instance of the graph in each place you want it to appear.

I'm sorry this feels unnecessarily awkward - it's impossible for Numbas to automatically copy interactive elements.

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[Don Shearman]

I had the same problem earlier in the year. Christian identified that the JSXGraph element was ending up in the "expected answer" box and not being displayed in the question. replacing the variable JSXGraph element with a function fixed this for us.

Don Shearman

[Martin Jones]

Thanks for pointing this out. I was indeed using the same graph in the advice section.