Getting 2D Turrets to rotate toward bullet direction.

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I’m trying to get my turret to rotate toward the bullet direction. I can’t seem to figure it out. My code is below for the bullet shooting out of the turret are below. The left and right floats are public variables I enter in for individual turrets. I have them shooting randomly within the confines of left and right. Can anyone point me in the right direction? Thank you!

public class TurretScript : MonoBehaviour {

	public float xRange;
	public float yRange;
	public GameObject bullet;
	public float bulletSpeed;
	public float startTime;
	public float bulletVelocity;

	// Use this for initialization
	void Start () {

		InvokeRepeating ("FireBullet", startTime, bulletSpeed);
	}
	
	// Update is called once per frame
	void Update () {
	

	}

    public void FireBullet()
    {

        float random = Random.Range(xRange, yRange);
        GameObject clone;
        clone = (Instantiate(bullet, transform.position, transform.rotation)) as GameObject;
        clone.GetComponent<Rigidbody2D>().AddForce(new Vector2(random, bulletVelocity));

    }
}

If i right translate u try rotate turrets to bullet direction use LookAt();
If u try create dispersion in shooting find turrets direction, calculate min,max direction(use Quaternion) and find random on interval