Question

List two ways that the Atlantic slave trade affected Africa.

Answer 1

One way would be population growth. Here are the population statistics from 1750 to 1850 with the average yearly population growth.
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Africa 106 to 111 million or - 0.0046% per year
Europe 163 to 276 million - 0.53% per year
Northern America 2 to 26 million - 2.60% per year
LA & Carribean 16 to 38 million - 0.87% per year
Asia 502 to 809 million - 0.48% per year
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See how low the population growth rate of Africa was compared to the rest of the world? And most of that growth rate in Africa occurred at the end of the 19th century when the Atlantic slave trade stopped.
The rest of the world was learning hygiene and medicine and eventually moving into an industrial revolution. Lifespans were being extended. Africans were dying young and exporting millions of it's people as slaves. People died in the wars to collect slaves, they died in the factories waiting for the slave ships, they died in the passage across the ocean, and they died in the "breaking in" camps when they arrived in the new world.
- The slave trade began before 1750 but the peak years were after 1750.
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The second way the slave trade affected Africa was that during this period no great empires or states were developed in Africa. Europe was coalescing into Italy, Germany, and the United Kingdom, the Austrian Hungarian empire, and the countries of the Americas were declaring their independence.
To a great extent the rest of the Atlantic nations were profiting from the labor of Africa and building the modern world. When the Atlantic Slave trade ended, the colonial occupation of Africa began.
"The Scramble for Africa" was the proliferation of conflicting European claims to African territory between the 1880s and World War I in 1914. When this period ended in the 1960's Africa began what may be it's greatest tragedy in the long run. The huge population explosion that may not end until the end of the 21st century.