if I back my iphone up which is linked to my ipod will it back them both up
I need to know asap
I need to know asap
Not sure what you mean by "linked" -- maybe same Apple ID? -- but in any event if you are referring to backing up to iCloud, you would want to back up both devices. iCloud will maintain the backups for each device separately. I currently have 1 iPhone and 2 iPads all set to automatically back up to iCloud via Settings > iCloud > Backup turned on for each.
if I back my iphone up which is linked to my ipod will it back them both up