Was slavery in the united states a paradox

On a supply and demand graph, equilibrium is the point where the two curves meet. the supply curve begins. the supply curve ends. the demand curve ends.

Which of the following statements about this graph is accurate? world grain production has increased in every year since 1950. the amount of grain grown between 1950 and 1980 decreased. world grain production has generally increased between 1950 and 2010. more grain was grown in 1950 than in any other year.

True exact date for the withdrawal of american combat troops in iraq was set for august 31st 1. 2011 2. 2010 3. 2012