You may notice once in a while that you can't see the graph that you're supposed to see in one of your questions in your quiz. This happens only in Chrome and Safari and is very easy to fix. Just follow the steps below.
Open the quiz from the LaunchPad home page, then click Resume the Quiz to resume taking the quiz.
Resume your quiz
Return the to question with a blank graph area
Notice in the example below that the graph for this question seems to be invisible.