How to Predict Future Values with FORECAST.LINEAR?
Linear Forecasting in Excel is a Excel function that predicts a future value based on existing values using linear regression.. Formula Genius generates and validates this formula automatically from a plain-English prompt.
Need to forecast future data points? The FORECAST.LINEAR function can help you extend a linear trend from your historical data.
The Formula
"Predict a future value by extending a linear trend from historical data using FORECAST.LINEAR"
=FORECAST.LINEAR(x, known_y's, known_x's)This formula predicts a future value based on existing values using linear regression.
Step-by-Step Breakdown
- Identify the x value for which you want to predict the y value.
- Select the range of known y values that correspond to your historical data.
- Select the range of known x values that correspond to your historical data.
- Use the FORECAST.LINEAR function to calculate the predicted y value.
Edge Cases & Warnings
- The known_x's and known_y's ranges must be of the same length.
- If the x value is outside the range of known_x's, the prediction may be less reliable.
- Empty cells in the known_y's or known_x's ranges can cause errors.
- Non-numeric values in the known_x's or known_y's will result in an error.
Examples
"x = 10, known_y's = {2, 3, 5, 7}, known_x's = {1, 2, 3, 4}"
The formula returns 12."x = 15, known_y's = {10, 20, 30}, known_x's = {5, 10, 15}"
The formula returns 40.Frequently Asked Questions
What does FORECAST.LINEAR do?
It predicts future values based on a linear trend from historical data.
Can I use this function for non-linear data?
No, FORECAST.LINEAR is specifically for linear trends.
What if my data has outliers?
Outliers can skew the results, so consider removing them before using the function.
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