Why did the bill of rights become part of the constitution?

The Bill of Rights are the first 10 amendments in the Constitution. These were put in after people wanting certain freedoms and rights in America. Federalists supported the amendments along with the Constitution because it gave people individual liberty, but Anti-Federalists felt as if the Constitution and its amendments gave the President and government too much power and the people should essentially self-govern and make their own laws.

the virginia plan called for three branches of government and two houses of congress. representation in each house would be determined by population. the new jersey plan called for three branches of government and a single house of congress. each state would have an equal vote.