Summary  
This chapter explains how to create and customize an area chart to visualize multiple data series over time—including selecting a data range, choosing the area-chart type, and assigning series to primary or secondary axes for clear comparison.  

General domain of usage  
Sales trend analysis

### **Benefits of Area Charts**

The primary advantage of an **Area Chart** over a **Line Chart** is that the shaded area beneath the line makes it easier to assess data volumes and cumulative values at a glance. This helps better visualize proportions and volumes, making the chart more informative for analysis.

### **Analyzing Results**

In 2019, a record number of trees were sold—33.02 million. However, in 2024, there is a sharp increase in the average price to $74.70 per tree, significantly higher than in previous years. At the same time, total sales fluctuated, peaking in 2011 (30.8 million) and hitting a low in 2012 (24.5 million). Thus, there is a trend of rising tree prices alongside fluctuating sales volumes.

Which step is necessary when creating an area chart in a spreadsheet?

Learn how to create and customize spreadsheets in Google Sheets, work with formulas and functions, including logical operations, format data, and sort and filter information. Master data visualization with charts and ensure data security during collaboration.

Learn how to create, rename, copy, delete, move, and download spreadsheets in Google Sheets. Acquire basic skills for organizing and managing data in a cloud-based environment.

Master the basics of editing and formatting data in Google Sheets. Learn how to adjust fonts, borders, colors, merge cells, and resize rows and columns to create clean and professional-looking tables.

Enhance your cell formatting skills: learn how to split text into columns, add hyperlinks, images, notes, and forms. Explore creating interactive and dynamic spreadsheets.


Develop skills to sort, filter, and clean data efficiently. Learn to use search and replace, conditional formatting, remove duplicates, and create named ranges to analyze large datasets.

Discover how to build charts and graphs to visualize data. Learn to customize line, column, pie, and area charts for clear and insightful reporting.

Understand the core functions in Google Sheets for working with numbers, text, and dates. Learn to apply arithmetic, statistical, text functions, and date-time functions for automated calculations and data analysis.

Explore logical functions for conditional data analysis. Learn how to use AND, OR, IF, and conditional formulas like SUMIFS, COUNTIFS, and AVERAGEIFS to create flexible calculations.

Discover how to manage collaboration and secure data. Learn to set access permissions, create notification rules, protect sheets and ranges, track version history, and recover data.