Whenever working with a set of data a regression line helps you to see the connection between the scatter data points. If you are looking for a way to **find the Slope of a regression line** then you have come to the right place. The focus of this article is to explain how to **find the Slope of a regression** line in Excel.

## What Is Slope of a Regression Line?

A regression line generally shows the connection between some scatter data points from a dataset. The equation for a **regression line** is,

**y = mx + b**

Where,

**m**= Slope of the Regression Line.**B**= Y-Intercept.

You can also use the following formula to find the **Slope** of a regression line.

**m = âˆ‘(x-Âµ _{x})*(y-Âµ_{y})/âˆ‘(x-Âµ_{x})Â²**

Where,

**Âµ**= Mean of known_{x}**x**values.**Âµ**= Mean of known_{y}**y**values.

## How to Find the Slope of a Regression Line in Excel: 3 Easy Ways

To explain this article, I have taken the following dataset. It contains **3 **columns, the **Month**, **Advertisement Cost**, and **Sales**. I will use this dataset to explain how to** find the Slope of a regression line **in Excel in **3 **different ways.

### 1. Use Excel Chart to Find the Slope of a Regression Line

In this first method, I will use an Excel chart to **find the Slope of a regression line** in Excel. Here, I will insert a **Scatter Chart **for the dataset and then find slope from it. Let’s explore the steps.

#### Step-01: Insert Scatter Chart in Excel

In this first step, I will insert the **Scatter Chart**.

- Firstly, select the data range with which you want to make the chart.
- Secondly, go to the
**Insert**tab from the**Ribbon**. - Thirdly, select
**Insert Scatter or Bubble Chart**.

- Consequently, a drop-down menu will appear.
- Select
**Scatter**.

- After that, you will see that you have inserted a
**Scatter Chart**for your selected data. **Click**on the marked portion to change the**Chart Title**.

- Finally, I have changed the
**Chart Title**and this is how my chart looks.

#### Step-02: Add Trendline

Now, I will add a** Trendline** to the **Scatter Chart**.

- In the beginning, select the chart.
- After that, select
**Chart Elements**. - Then,
**Check**the**Trendline**option.

- After adding the
**Trendline**this is how my chart looks.

#### Step-03: Display Trendline Equation on Chart and Find Slope

Here, I will display the **Trendline Equation** on the chart.

- To do that,
**Right-click**on the**Trendline**. - Then, select
**Format Trendline**.

- Consequently, the
**Format Trendline**task pane will appear on the right side of the screen. - Select the
**Trendline Options**tab. - After that,
**Check**the**Display Equation on chart**option.

- After that, you will be able to see the equation for the
**Trendline**on the chart.

- Now, find out the
**Slope**from the equation and write it down in your preferred location.

**Read More: How to Find Instantaneous Slope on Excel**

### 2. Apply SLOPE Function to Calculate the Slope of a Regression Line in Excel

You can also use **the SLOPE function** to **find the Slope of a regression line** in Excel. The **SLOPE** function returns the Slope of a regression line through known data points. Letâ€™s see the steps of this calculation.

**Steps:**

- Firstly, select the cell where you want the
**Slope**. Here, I selected**Cell C12**. - Secondly, in
**Cell C12**write the following formula.

`=SLOPE(D5:D10,C5:C10)`

- Thirdly, press
**Enter**to get the result.

Here, in the **SLOPE **function, I selected cell range **D5:D10 **as **known_ys**, and **C5:C10 **as **known_xs**. The formula will return the slope of the regression line for these data points.

**Read More: How to Find the Slope of a Line in Excel**

### 3. Determine Slope of a Regression Line Manually Using SUM and AVERAGE Functions

Now, I will show you how you can determine the **Slope of a regression line** manually in Excel. I will use **the SUM function** and **the AVERAGE function** for this calculation. Letâ€™s see the steps of this calculation.

**Steps:**

- In the beginning, select the cell where you want the
**Slope**. - Next, write the following formula in that selected cell.

`=SUM((C5:C10-AVERAGE(C5:C10))*(D5:D10-AVERAGE(D5:D10)))/SUM((C5:C10-AVERAGE(C5:C10))^2)`

- After that, press
**Enter**to get the result.

**🔎** **How Does the Formula Work?**

**AVERAGE(C5:C10):**Here, the**AVERAGE**function returns the**average**of cell range**C5:C10**.**(C5:C10-AVERAGE(C5:C10)):**Now, the**average**is**subtracted**from the cell range**C5:C10**.**AVERAGE(D5:D10):**Here, the**AVERAGE**function returns the**average**of cell range**D5:D10**.**(D5:D10-AVERAGE(D5:D10):**Now, the**average**is**subtracted**from the cell range**D5:D10**.**(C5:C10-AVERAGE(C5:C10))*(D5:D10-AVERAGE(D5:D10)):**Here, the formula**multiplies**the results it got from the previous formulas.**SUM((C5:C10-AVERAGE(C5:C10))*(D5:D10-AVERAGE(D5:D10))):**Now, the**SUM**function returns the**summation**of these values.**(C5:C10-AVERAGE(C5:C10))^2:**Here, the average of cell range**C5:C10**is**subtracted**from cell range**C5:C10**. And then**raised to the power**of**2**.**SUM((C5:C10-AVERAGE(C5:C10))^2):**Now, the**SUM**function returns the**summation**of the values it got from the previous calculation.**SUM((C5:C10-AVERAGE(C5:C10))*(D5:D10-AVERAGE(D5:D10)))/SUM((C5:C10-AVERAGE(C5:C10))^2):**Finally, the first**summation**is divided by the second**summation**.

**Read More: ****How to Find Slope of Logarithmic Graph in Excel**

## Practice Section

Here, I have provided a practice sheet for you to practice how to **find the slope of a regression line** in Excel.

**Download Practice Workbook**

## Conclusion

So, you have reached the end of my article. Here, I tried to explain how to** find the slope of a regression line** in Excel in **3 **quick ways. I hope this article was helpful to you. If you have any questions, feel free to let me know in the comment section below.

## Related Articles

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