A sales department is analyzing the sales trend for one of their best products. They collected quarterly sales number over the past five years and want to plot the data in a graphical format for quick analysis and interpretation. Which one is NOT a good way to visualize?

Pie chart is not a good way to visualize the sales trend for a product over time. A pie chart is typically used to display the proportion of different categories within a single data point, rather than showing changes over time. In this case, a line chart or column chart would be a better choice as they are more suitable for visualizing trends over time. A bar chart could also be used to compare the sales for different quarters in each year.