How do you dynamically setup a select from array

Hi all,
Really simple question:

I have

1. an array ‘array_type’ which is populated by a page flow.
   

2. A select that references the datasource ‘arr_type’
   

Question:

1. can I populate the select using an array this way?
2. If this is possible how do I create/access text and value fields using this method.

Thanks