Question

7. What parts of the country were most of the new RR lines added to as you scroll through the dates?

8. What do you think is the connection between where the RR lines are going and where the cities/big cities are?

Answer 1

Step-by-step explanation:

7. The 1850s had seen enormous growth in the railroad industry so that by 1861, 22,000 miles of track had been laid in the Northern states and 9,500 miles in the South.

8. The growth of railroads throughout history has facilitated the growth of cities, leading to improved quality of life in many areas. A major contributor to city growth was the development of transcontinental railroads which linked America and cities popped up along this railroad.