# LOGEST

## Content

This function calculates an exponential curve that fits the data and returns an array of values that describes the curve.

## Syntax

`LOGEST(y, [x], [constant], [stats])`

## Arguments

The equation for the curve is y=b\*m^x or y=(b\*(m1^x1)\*(m2^x2)\*\_).
This function has these arguments:

| Argument | Description |
| -------- | ----------- |
| *y* | [Required] Set of y values that are known in the relationship y=b\*m^x |
| x | [Optional] X is an optional set of x values that may be known in the relationship y=mx+b |
| *constant* | [Optional] Logical value that specifies whether to force the constant b to equal 0. If true or omitted then b is calculated normally; if false then b is equal to 0 and the m values are adjusted so that y=m^x. |
| *stats* | [Optional] Logical value that specifies whether to return additional regression statistics. If true, then the additional regression statistics are returned if false or omitted then only the m-coefficients and b are returned. |

If x is omitted then x defaults to the array {1,2,3...}, which has the same dimensions as y.

## Remarks

Use the INDEX function to get individual elements from the returned array.

## Examples

`LOGEST(A2:A7,C2:C7,TRUE,FALSE)`