The **slope **of a trendline represents the average increase in the y-value for a one unit increase in the x-value.

To find the slope of a trendline in Google Sheets, we can use the **SLOPE **function.

This functions uses the following syntax:

**SLOPE(data_y, data_x)**

where:

**data_y**: The range of y-values**data_x**: The range of x-values

The following example shows how to use this function in practice to calculate the slope of a trendline in Google Sheets.

**Step 1: Create the Data**

First, let’s create a dataset with two variables in Google Sheets:

**Step 2: Calculate Slope of Trendline**

Next, let’s type the following formula into cell **E1** to calculate the slope of the trendline for this dataset:

=SLOPE(B2:B21, A2:A21)

The following screenshot shows how to use this formula in practice:

From the output we can see that the slope is roughly **0.917**.

This means that the value for y increases by an average of **0.917** for a one-unit increase in x.

**Step 3: Visualize Slope of Trendline**

To visualize the slope value, we can create a scatterplot and add a trendline.

To do so, highlight the values in the range **A2:B21**, then click the **Insert **tab, then click **Chart** from the dropdown menu:

In the **Chart editor** window that appears on the right side of the screen, choose **Scatter chart** as the **Chart type**.

Then click the **Customize** tab, then scroll down to **Series**, then check the box next to **Trendline** and click **Use Equation** in the dropdown under **Label**:

The trendline and the equation for the trendline will be displayed on the chart:

From the output we can see the formula for the linear trendline:

**y = 0.917x + 12.5**

This tells us that the y-intercept for the trendline is **12.5** and the slope is **0.917**.

This means that the value for y increases by an average of **0.917** for a one-unit increase in x.

**Additional Resources**

The following tutorials explain how to perform other common tasks in Google Sheets:

Curve Fitting in Google Sheets

How to Add Trendline to Chart in Google Sheets

How to Add Multiple Trendlines to Chart in Google Sheets