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FORECAST function

Returns a value along a linear trend

Syntax

FORECAST(x, known_y's, known_x's)

Square brackets indicate optional arguments.

Arguments

ArgumentRequiredMeaning
xYesThe data point for which you want to predict a value.30
known_y'sYesThe dependent array or range of data.A1:A4
known_x'sYesThe independent array or range of data.B1:B4

Try FORECAST

Read a legacy straight-line forecast formula

=FORECAST(5,B2:B5,A2:A5)

This legacy function predicts 11 from y=2*x+1 at x=5. New workbooks can use FORECAST.LINEAR; FORECAST remains useful when reading older formulas.

Inspect the current formula

Read its written arguments or observe actual operation values in a separate local calculation. This action neither applies a draft nor grades an answer.

Read the formula, one argument at a time

Explore the written function calls and their inputs. The calculation result belongs to the complete formula.

FORECAST · top-level call

=FORECAST(5,B2:B5,A2:A5)

1 / 3 · x

The data point for which you want to predict a value.

FORECAST reference ↗

Follow the cells behind a result

Read explicit local references and helper formulas using a separate calculation. Your draft stays in this field; the worksheet and practice checks do not change.

The worksheet runs locally. Published checks apply to the supplied example only. Native Excel and Google Sheets compatibility remain unverified.

Reference and compatibility

Univer 1.0.4 / Apache-2.0. Calculation checks cover the supplied examples only. The browser worksheet does not implement every Excel feature, external service or connected data type.