The given line graph illustrates how the population in Columbia, Yamhill, and Washington changed from 1940 to 2000.
Overall, all the nations increase in their populations over the period. Moreover, Washington showed the highest population, while Columbia saw the lowest between 1940 and 2000 in comparison.
Looking at the graph in more detail, the population of Washington was the highest compared with the other two regions, with about 75,000. From 1940 to 1970, Washington presented a gradual growth before increasing considerably to just over 240,000 in the last thirty years. Still, it showed the greatest population in the three countries.
Yamhill population, in 1940, was 30,000 then rose slightly to about 45,000 in 1970. Afterward, Yamhill witnessed a marginal increase to roughly 90,000. In addition, Colimbia had a similar trend to Yamhill. In fact, its figure was just under 30,000 in the beginning and by the year 2000, it reached approximately 80,000, which was the lowest number among the three areas.
