Look at the graph below, which shows the population of the United States from 1790 to 1910. A graph titled U S Population Growth in millions where the years 1790 to 1910 are shown on the x-axis and the population range is on the y-axis. A line begins at 5 at 1790, rises gradually to 20 at 1840, then rises dramatically to 90 at 1910.

During the Gilded Age the US population rose
from 15 million in 1830 to nearly 30 million in 1850.
from 15 million in 1830 to nearly 40 million in 1870.
from nearly 40 million in 1870 to nearly 80 million in 1900.
from nearly 40 million in 1870 to nearly 100 million in 1950.