FORECAST

Returns the expected y value for a given x value based on linear regression of data.

Syntax

FORECAST(new_x_value; y_values; x_values)

new_x_value: The data point for which to predict a value. Eg., 10

y_values: A single row or column data specifying the y values. Eg., A2:A6

x_values: A single row or column data specifying the x values. Eg., B2:B6

Both y and x values must be of the same size.

Examples

Formula	Result
=FORECAST(C2;A2:A6;B2:B6)	21.58490566
=FORECAST(C3;A2:A6;B2:B6)	33.702830189
=FORECAST(C4;A2:A6;B2:B6)	56.20754717

Get a hands-on experience of the function in the embedded range below.

Possible Errors

Errors	Meaning
#N/A!	The function could not find the value it was asked to look for. Commonly occurs in VLOOKUP and similar functions.
#NAME!	The function name is incorrect or invalid. The given defined name (if any) is invalid. There is a typo in the defined name used in the function. Double quotes are missing for text values in the function. Colon missing in a cell range reference.
#VALUE!	The given argument's data type is incorrect or invalid. For example, the function =DATE(A1:A3) will return a #VALUE error when a text value is present in the range.
#REF!	The given cell reference is incorrect or invalid. This error may occur when a cell/range has been deleted, moved, or pasted over.
#N/A!	The value of x_values or y_values is empty. The number of values in x_values and y_values is not equal.

Similar Functions

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