What was the approximate count in 1986?

What was the approximate count in 1986?

• A. 320
• B. 820
• C. 150
• D. 400

Answer: (A)

The main idea here is reading an approximate value from a data plot. To estimate the count for a specific year, find that year on the horizontal axis and look at where the data point falls on the vertical axis, then pick the value it most closely matches. For 1986, the data point sits closest to 320 on the vertical axis, so the approximate count is 320. The other numbers are farther from where the point lies (they would under- or overestimate the observed value). If you skim the graph, you’d compare the 1986 point to nearby marks and see that 320 is the nearest match.

The main idea here is reading an approximate value from a data plot. To estimate the count for a specific year, find that year on the horizontal axis and look at where the data point falls on the vertical axis, then pick the value it most closely matches.

For 1986, the data point sits closest to 320 on the vertical axis, so the approximate count is 320. The other numbers are farther from where the point lies (they would under- or overestimate the observed value). If you skim the graph, you’d compare the 1986 point to nearby marks and see that 320 is the nearest match.