Graph questions

The first graph shows how the population of Africa steadily increased from 1500 to 1800. The second graph shows how the slaves exported out of Africa also increased from 1500 to 1700. The third graph shows all the destinations the slaves were taken to in the western hemisphere, with the Caribbean importing the most. On a DBQ, I would write about how the population of Africa increased while the slave trade also increased at the same time. I would also write about how how most of the slaves were taken to Brazil and the Carribean, both colonies that ran sugar plantations and had a limited population of natives to work those lands, resulting in the high need of African slaves to do the intense labor required for sugar production. I find it surprising and rather contradictory that the population of Africa rises steadily while the slave trade took increasing numbers of Africans from Africa. This does help my understanding of the textbook's contents, since the textbook discusses the same general information as is presented in these graphs, and the graphs reinforce that information with visual and numerical data.