Pass Previous Pages Selection To Multi Select Field

Hello, I believe what I'm needing help with is dynamic population but I'm having trouble getting my cabeza around everything.

On a page in my site, I have 5 products that I want people to sign-up for - they can only choose one. I simply want the pricing multi-select field to be selected when they jump to my Gravity Form...based on what product they chose on the previous screen.

So if they chose "Free", $0 would be selected on the multi-select field.

Is there a basic example of this you could share? I've read the documentation and I'm still a little confused.

Thanks!

It did, thank you. The only missing piece of the equation that wasn't exactly clear on the article was that you need to put in the value in the field that is in question. Once I did that, everything works great.