1. your in the wrong subject
2. The trend line or line of best fit is used to describe the relationship of data in a scatterplot because it shows a general trend in the data points. A trend line will get you the most accurate predictions you can out of scattered data points.
Answer:
American Civil War
Explanation:
The invention of the cotton gin in 1793 solidified the importance of slavery to the South's economy. By the mid-19th century, America's westward expansion, along with a growing anti-slavery movement in the North, provoked a national debate over slavery that helped precipitate the American Civil War
The answer to your question is D. Ferdinand and Isabella sponsored his first voyage<span />
Barbarian attacks caused the collapse of the Western Roman Empire.
