1. The problem asks to create a double line graph showing the population of Los Angeles City and Los Angeles County from 1900 to 2000. 2. A double line graph plots two sets of data on the same axes to compare trends over time. 3. The x-axis represents the years from 1900 to 2000. 4. The y-axis represents the population in millions, ranging from 0 to about 10 million. 5. Plot the points for LA City: (1900,0.1), (1910,0.3), (1920,0.6), (1930,1.2), (1940,1.5), (1950,2.0), (1960,2.5), (1970,2.8), (1980,3.0), (1990,3.5), (2000,3.7). 6. Plot the points for LA County: (1900,0.2), (1910,0.5), (1920,0.9), (1930,2.2), (1940,2.8), (1950,4.1), (1960,6.0), (1970,7.0), (1980,7.5), (1990,8.9), (2000,9.5). 7. Connect the points for each dataset with lines to show the population growth trends. 8. The graph visually shows that LA County's population grew faster and is larger than LA City's population throughout the century. Final answer: The double line graph is represented by the SVG below, showing two lines for LA City and LA County populations over time.