This Excel tutorial explains how to use the Excel LINEST function with syntax and examples.

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Description

The Microsoft Excel LINEST function uses the least squares method to calculate the statistics for a straight line and returns an array describing that line.

The LINEST function is a built-in function in Excel that is categorized as a Statistical Function. It can be used as a worksheet function (WS) in Excel. As a worksheet function, the LINEST function can be entered as part of a formula in a cell of a worksheet.

The Microsoft Excel LINEST function uses the least squares method to calculate the statistics for a straight line and returns an array describing that line. The LINEST function is a built-in function in Excel that is categorized as a Statistical Function. It can be used as a worksheet function (WS) in Excel. Oct 12, 2010  You need to select A14:E18, then enter =LINEST(E2:E12,A2:D12,TRUE,TRUE) into A14 and hit Ctrl-Shift-Enter. Re: LINEST array formula not working I knew it was something simple, I didn't highlight a range of cells before entering the formula. Start your search for help on your products and find links to business support plans. GET HELP NOW If you need help with a Microsoft Store product, subscription, or service, get in touch with Microsoft experts via live chat, by phone, and in-person for guidance on technical problems, system tune-ups, security settings, optimizing system performance, and more. Mac service and repair. Learn about AppleCare+ and the Apple limited warranty coverage, start a service request for your Mac, and find out how to prepare your Mac for service. Learn more about repairs.

The LINEST function uses the following line equation:

Syntax

The syntax for the LINEST function in Microsoft Excel is:

Parameters or Arguments

y_values

The known set of 'y values' from the line equation.

x_values

Optional. It is the known set of 'x values' from the line equation. If this parameter is omitted, x_values is assumed to be {1,2,3,..} with the same number of values as y_values.

constant

Optional. It is either TRUE or FALSE. If this parameter is omitted, the function will assume TRUE. If constant is TRUE, b in the line equation is calculated normally. If constant is FALSE, b becomes 0 so that the line equation is evalulated as y = mx.

additional_statistics

Optional. It is either TRUE or FALSE. If this parameter is omitted, the function will assume FALSE. If additional_statistics is TRUE, the function will return additional regression statistics. If additional_statistics is FALSE, the function will returns only m coefficients and b constant.

Returns

The LINEST function returns a numeric value.

Applies To

• Excel for Office 365, Excel 2019, Excel 2016, Excel 2013, Excel 2011 for Mac, Excel 2010, Excel 2007, Excel 2003, Excel XP, Excel 2000

Example (as Worksheet Function)

Let's look at some Excel LINEST function examples and explore how to use the LINEST function as a worksheet function in Microsoft Excel:

This first example we have entered the y values in column A (cells A2 through A6) and the x values in column B (cells B2 through B6). Then we have entered the following LINEST function in both cells D2 and E2 as follows:

The LINEST function can be written as an array formula. When creating your array formula, you need to do the following:

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1. Enter the formulas in both cells D2 and E2
2. Highlight cells D2 and E2
3. Press F2 (in Windows) or CONTROL+U (on Mac)
4. Press Ctrl+Shift+Enter

This creates {} brackets around your formulas as follows:

You can see how the formula look in the images below.

The value in cell D2 returns the slope of 0.5 and the value in cell E2 returns the y-intercept of 0.

This formula could also be written as follows (entering values instead of cell ranges):

The LINEST function can be written as an array formula. When creating your array formula, you need to do the following:

1. Enter the formulas in both cells D2 and E2
2. Highlight cells D2 and E2
3. Press F2 (in Windows) or CONTROL+U (on Mac)
4. Press Ctrl+Shift+Enter

This creates {} brackets around your formulas as follows:

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