I want to lerp rotation

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class MoveCamera : MonoBehaviour
{
    private Vector3 Target;
    private Vector3 cameraStartPosition;
    private bool isLerping;
    public float Speed;

    public void CameraPosition1()
    {
        isLerping = true;
        cameraStartPosition = transform.position;
        Target = new Vector3(30f, 2.5f, -5f);
    }
    public void CameraPosition2()
    {
        isLerping = true;
        cameraStartPosition = transform.position;
        Target = new Vector3(-30f, 10f, 200f);
    }
    void FixedUpdate()
    {
        if (isLerping)
        {
            transform.position = Vector3.Lerp(cameraStartPosition, Target, Speed * Time.deltaTime);
        }
    }
}

How can I lerp my camera rotation as well? I want the first position to have rotation of 270, and the second 90.

Use Quaternion.Slerp()