OFFICIAL EXPLANATION


Now we refer only to the graph; we don't need the table. Find the vertical line for 1920; it's the first one in from the left. Now move up until you find the lines. The solid line is Wisconsin, and reading the right-hand scale we see that Wisconsin's population was approximately 2250 thousand, or 2.25 million. New York's dotted line is a little above Wisconsin's solid line; reading to the lefthand scale, we find that New York's 1920 population was approximately 10,000 thousand, or 10 million. The difference is 10 million- 2.25 million, or approximately 7.75 million.