How to pass vars into functions

Hello, I am trying to pass a variable into a function but I am not sure what the variable should be. If you reference my code I am trying to pass the var movement variable to my IEnumerator slowMoveTime function. Thanks for the help.

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

public class slowMovement : MonoBehaviour {

	public int damage;
	public float time;
	public float speed;
	// Use this for initialization
	void Start () {


	// Update is called once per frame
	void Update () {

	void OnTriggerEnter (Collider col) {
       if (col.GetComponent<Collider>().tag == "LocalPlayer") {
			Debug.Log ("hit the remoteplayer");
			var hit = col.gameObject;
			var health = hit.GetComponent<Health> ();
			var movement = hit.GetComponent<PlayerController> ();
			if (health != null) {
				health.TakeDamage (damage);
			if (movement != null) {
				movement.speed = speed;
				StartCoroutine(slowMoveTime (time, movement));

			Destroy (gameObject);


	IEnumerator slowMoveTime  (float time,"what goes here" movement) {
		yield return new WaitForSeconds (time);

Based on theline:

var movement = hit.GetComponent<PlayerController> ();

your movement variable is of type PlayerController, which is the type you need to set for the coroutine. So your coroutine definition becomes:

IEnumerator slowMoveTime  (float time, PlayerController movement) {