How can I transfer my Apple iPad data to my triotablet

Im not sure what you mean by 'link'. Maybe you mean Sync?

If you are looking to Sync the two devices, you have to upload your data to icloud. Apple gives us all 5GB of free storage. I normally sync my Notes App, Contacts, Calendar, Reminders and a few other. You have to be using the same Apple ID on both devices.
Go to your Settings. Go to iCloud. turn on the apps you want to sync.

There are several ways to transfer apps and data between iPads, just check out this detailed tutorial if desired:
https://www.leawo.org/tutorial/how-to-transfer-app-between-ipads-1361.html?=1400

got itune? if not down load it, install it then connect your ipad and you're good to go

If your apps were from the apple AppStore they should be in the cloud and you should be able to retrieve them on your new Apple device as long as you know your Apple ID and password along with your iCloud password

The apple store is great help in this area. Apple is a little complicated. Their Tech's are very helpful.

Hagd!

Can you install Dropbox app on both tablets to transfer pictures? Or feel free to try this iPad file transfer program on your computer. Transfer Files among iOS Devices iTunes and PCs with Ease

The best way is to use a transfer tool, this one works well:

How to Transfer Movies from iPad to PC Mac Windows 7 8

Well, this isn't definite, but it could be worth a try, but you'll lose your information on your iPad air, so if you have data on it you also don't want to lose, I don't believe it can be done, without some hacking techniques. Backup your iPad 1 to iTunes, then erase all data on your Air. Once you have now plug your air into the computer you just backed up your iPad1 and select to restore from backup. Like I said you will olds all of the data on your air, and if it's not duplicated on your iPad 1, then it'll be gone forever and probably not worth it for this one game.

Connect your iPad to your PC. Start iTunes. In the left column of iTunes on your PC you should see your iPad listsxed. Select your iPad. Look for photos in the bar at the top of the right column in iTunes on your PC.

For more detailed guide of transferring photos from PC to iPad, follow this tip "Copy files from Computer to iPad".