Vector3.Lerp with Translate Javascript

Hello.

I am making a walljump script in which if the raycast is true and the spacebar is pressed, the player is moved backards in the manner of a walljump. I am trying to make it as smooth as possible, hence why there is Time.deltaTimes everywhere. I want to use a lerp, but don't know how to do that with a translate. Thanks.

 var walljumpHeight : int = 30;
 var walljumpLength : int = -50;
 var raycastLength : int = 1;

 function Start () {

 }

 function Update () {
     var fwd = transform.TransformDirection (Vector3.forward);
         if (Physics.Raycast (transform.position, fwd, raycastLength) &&  Input.GetButton ("Jump") ) {
         transform.Translate(0, walljumpHeight * Time.deltaTime, walljumpLength * Time.deltaTime);
 }

}