The provided line graph illustrates the population size in three different states, Oregon and Washington, over three decades from 1970 to 2000.
Overall, what stands out from the graph is that all three states experienced an upward trend during the period, although the rates of growth and patterns varied considerably. Washington consistently recorded the highest figures, whereas Columbia and Yamhill stayed slightly lower and showed similar results from 1970.
In 1940, Washington’s population stood at 75 thousand people and increased to around 125,000 by 1970. Without any decline, figures rose again to 245 thousand by 2000. In contrast, the other two states exhibited a steady and gradual increase. During 1940 and 1970, Columbia had almost the same number of individuals, nearly 30,000, although beginning from 1970, it increased dramatically, reaching about 80 thousand people by the end of the given timeframe. Yamhill, in contrast, stood at its lowest point (30 thousand) and demonstrated an increase up to 45,000 in 1970. Turning to 2000, it experienced a sharp increase, ultimately reaching its peak with a population of 90,000.