This site will give you a good explanation.
http://www.u-s-history.com/pages/h1209.html
the proclmation line of 1763 was intended by the british government to:
1. repress the colonists
2. erect a dike against all future settlent
3. promote land speculation
4. deal fairly with the indian problem
I think it is 3
3 answers
so it would be 4 then
Sounds good to me.