Information Communication Technology ICT – 16 Graphs and charts | e-Consult

To add a second axis to the graph, the student would use a dual-axis graph. This involves plotting two different datasets on the same graph, each using a separate y-axis. The x-axis would remain the same (number of hours studied). One y-axis would represent the percentage grade, and the second y-axis would represent the percentage grade achieved based on the number of practice questions completed.

The most suitable type of graph for this data is a line graph or a scatter plot. A line graph would show the trend of the percentage grade over the number of hours studied and the number of practice questions. A scatter plot would show the individual data points for each combination of hours studied and practice questions.

Benefits of using a second axis:

• Allows the comparison of two different datasets on a single graph, which can reveal correlations.
• Can be useful when the ranges of the two datasets are significantly different.

Limitations of using a second axis:

• Can be misleading if the scales of the two y-axes are not carefully chosen. Unequal scales can exaggerate or diminish the apparent relationship between the data.
• Can make the graph difficult to read and interpret if not designed clearly.