The provided linegraph illustrates the number of population in three different states of Oregon, Washington, over three decades from 1970 to 2000.
Overall, what stands out of 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 and showed same results from 1970.
In 1940, Washington’s population stood at 75 thousand people and increased to around 125,000 by 1970. Without any declined figures rose again to 245 thousand by 2000. In contrast, other two states exhibited a steady and gradual increase During 1940 and 1970 ,Columbia had almost same number of individuals nearly 30,000 , although beginning from 1970 it increased drammatically by reaching an about 80 thousand people to the end of the given timeframe. Yamhill, in contrast standed at its lowest point (30, thousands) and demonstrated an increase up to 45,000 in 1970. Turning to 2000, it experienced a sharp increase, ultimately reaching its peak with 90,000 of population.