DOTween Custom Ease Function

// Must return a value between 0 and 1
// time: the current elapsed time since the tween started
// duration: the total duration of the tween
// overshootOrAmplitude: ignore this
// period: ignore this
public float CustomLinearEase(float time, float duration, float overshootOrAmplitude, float period)
{
    return time / duration;
}

void CreateTweenWithCustomEase(Transform t)
{
    // This will create a tween with a linear ease
    t.DOMoveX(1, 2).SetEase(CustomLinearEase);
}