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EXCEL FORECAST.LINEAR FUNCTION
Excel FORECAST.LINEAR Function Introduction
Forecast in Excel. Linear function predicts a future point on a linear trend line fitted to a collection of x- and y-values given.
Description of Excel FORECAST.LINEAR Function
Syntax :
=FORECAST.LINEAR( x, known_y’s, known_x’s )
Parameters :
- The function parameters are as follows:
x –
- A numeric x-value for which a new y-value is to be forecasted.
known y’s –
- A collection of known y-values.
known x’s –
- A collection of known x-values.
Step By Step Guide of FORECAST.LINEAR Function
Example :
In the following worksheet, the Excel Forecast.
A linear function is used to predict an additional point along the best-fit straight line using a set of known x- and y-values (stored in cells F2:F7 and G2:G7).
The function to compute the predicted y-value at x=7, as indicated in cell F7 of the spreadsheet, is:
=FORECAST.LINEAR( 7, G2:G7, F2:F7 )
This yields the result 32.666667.
Key Points
- #N/A – Occurs if the lengths of the specified known x and supplied known y arrays disagree.
- #DIV/0! – This happens if the variance of the given known x’s is equal to zero.
- #VALUE! – This error occurs if the given future value of x is not a number.
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