A digital marketing manager is reviewing several reports to understand different aspects of the company's online performance. Each report contains different types of graphical representations of data.
Consider the following types of graphics the manager encounters:
- Option I: A bar chart showing the monthly distribution of site traffic from various channels.
- Option II: A line chart depicting the week-over-week growth in user sign-ups.
- Option III: A conditional formatting setup highlighting high-performing keywords in an Excel sheet.
- Option IV: A pie chart illustrating the proportion of new versus returning visitors.
Which of the following is NOT a type of data visualization typically used in reporting?