For which of the following datasets would it be most appropriate to use a line graph to display the data?
The frequency of distinct categories of helping behaviour observed in a playground setting.
Mean scores on a memory recall task compared across three different age-group cohorts.
Changes in participant anxiety ratings (on a scale of 1-10) measured every 15 minutes during a public speaking task.
The percentage of students selecting each of five career paths after completing their degree.
