The definition of a graph is a diagram showing the relationships between two or more things. An example of graph is a pie chart. Graph is defined as to create a diagram that shows a relationship between two or more things. An example of graph is to create a series of bars on graphing paper.
President Abraham Lincoln - Slavery Abolished: On September 22, 1862 President Abraham Lincoln, United States of America, took the first step to abolish slavery Home President Abraham Lincoln - Slavery Abolished On Sept. 22, 1862, United States of America  issued the preliminary Emancipation Proclamation, declaring all slaves in rebel states should be free as of Jan. 1, 1863.
The Republic of Vermont banned slavery in its constitution of 1777 and continued the ban when it entered the United States in 1791. Through the Northwest Ordinance of 1787 under the Congress of the Confederation, slavery was prohibited in the territories north west of the Ohio River.