Version: 2017.2
public static AnimationCurve Linear (float timeStart, float valueStart, float timeEnd, float valueEnd);

Parameters

timeStart The start time for the linear curve.
valueStart The start value for the linear curve.
timeEnd Количество ключей в кривой. (Read Only)
valueEnd Количество ключей в кривой. (Read Only)

Returns

AnimationCurve The (straight) curve created from the values specified.

Description

Прямая линия начинается в timeStart, valueStart и заканчивается в timeEnd, valueEnd.

This is something of an oxymoron as the generated "curve" is actually a straight line, however it is still called a "curve" and represented by an AnimationCurve object.