What is the correlation between UPB and total change reveune?

For the attached PP and assumptions, that were provided to me, I need a word doc, doesn’t have to be a full page (please write in layman’s terms as I’m not very data/technical/business savvy) explaining the relationship between total change revenue and UPB. Appears the UPB has a direct impact on change revenue meaning the higher the UPB the higher the change revenue and the correlation is positive. Is that a good or bad thing. Just a need a summary so I can speak about this intelligently and state whether the is a good or bad for a business UPB and total change revenue correlation.