How to change speed of animation in C#

I have an animation clip called "slideAnimClip" which runs perfectly when I play the game. However it's a prefab and I want many of these to be on the screen running at different speeds depending on circumstance.

Here is my script

 using UnityEngine;
 using System.Collections;
 
 public class slideBangScript : MonoBehaviour {
     
     public float animSpeed = 1f;
     public Animation anim;
 
     void Update () {
     Animation["slideAnimClip"].speed = animSpeed;
     }
 }

I think this should be correct, but I keep getting this error:

Assets/Scripts/slideBangScript.cs(12,9): error CS0119: Expression denotes a type', where a variable', value' or method group' was expected

I'd be extremely grateful for any help.

Thanks.