Question

To display the number of female members in band class over the past five years, use a  
line graph
, because the data are  
not categorical
.


To display the responses of a survey that asked students what their favorite music type is, use a  
line graph
, because the data are  
not changing over time

Answer 1

Close — the first is fine but the second is incorrect. Correct wording and brief reasons:

- To display the number of female members in band class over the past five years, use a line graph (or a time-series plot). Reason: this is numerical data measured across an ordered time axis, so a line plot clearly shows trends over time.

- To display responses to a survey asking students’ favorite music type, use a bar chart (or a pie chart if you want part‑to‑whole). Reason: favorite music type is categorical (nominal) data, not a time series, so bars (or slices) compare frequencies across categories better than a line graph.

Extra note: if you have counts by category for multiple years, consider a grouped/stacked bar chart or small multiples rather than a single line per category unless each category’s counts form a meaningful time series.