Which result is considered inaccurate in a drawn graph context?

• A. A value that exactly matches a plotted point.
• B. A point not appearing on the drawn graph, read its x-axis and explain it does not occur.
• C. A value that lies exactly on the y-axis.
• D. A value that is one unit away from a plotted point.

Answer: (B)

When reading a drawn graph, the information you can rely on is the data points and the relationship shown. A value is only accurate if there is a plotted point (or a justified interpolation) at that position. If you propose a specific point that does not appear on the graph, you’re stepping beyond what the graph supports. To check, you can look at the x-axis value that would correspond to that proposed point and see whether the graph actually has a point there. If there isn’t one, you must conclude that the proposed result doesn’t occur according to the data, which is why that option describes an inaccurate result.

Values that exactly match a plotted point are correct, and small deviations from a plotted point can be acceptable within reading or plotting uncertainty. The key idea is that only what the graph shows (and valid interpolations) is considered accurate.