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Google Sheets

Google Sheets Line of Best Fit: A Step-by-Step Guide

Adding a line of best fit in Google Sheets is a powerful way to visualize trends and relationships within your data. In this step-by-step guide, we'll explore various methods to seamlessly add a line of best fit, allowing you to analyze and interpret the underlying patterns in your dataset.

Recognizing the Importance of a Line of Best Fit

A line of best fit, also known as a trendline, helps identify the general trend or pattern within your data points. Mastering the art of adding a line of best fit in Google Sheets enhances your ability to make informed decisions based on data trends.

Method 1: Utilizing the "Trendline" Feature

Explore the built-in "Trendline" feature in Google Sheets to add a line of best fit. Understand how to select a chart series, access the Chart Editor, and enable the trendline option, allowing Google Sheets to automatically calculate and display the best-fit line.

Method 2: Manually Drawing a Line of Best Fit

Dive into the concept of manually drawing a line of best fit using a line shape. Learn how to insert a line shape from the "Drawing" menu, position it to represent the desired trend, and customize its appearance to suit your visual preferences.

Method 3: Adding a Regression Line with Formulas

Explore the use of regression formulas to calculate and add a line of best fit to your data. Understand how to use statistical functions like SLOPE and INTERCEPT to determine the equation of the best-fit line and then plot it on your Google Sheets chart.

Method 4: Dynamic Trendlines with Google Sheets Functions

Understand how to create dynamic trendlines using Google Sheets functions. Learn how to use functions like TREND or LINEST to calculate the best-fit line based on your data, providing a dynamic representation that updates as your dataset changes.

Method 5: Customizing Trendline Appearance

Explore customization options for the appearance of your trendline. Learn how to adjust the color, thickness, and style of the trendline, ensuring that it complements the overall design of your chart and effectively conveys the data trend.


In conclusion, adding a line of best fit in Google Sheets is a valuable skill for visualizing and interpreting data trends. Whether you're using the built-in "Trendline" feature, drawing a line manually, calculating regression lines with formulas, or creating dynamic trendlines with functions, the methods outlined in this guide provide you with a comprehensive understanding of how to represent trends effectively. By incorporating these techniques into your data analysis workflow, you'll empower yourself to gain deeper insights from your Google Sheets charts and make informed decisions based on data trends.