🔍 Key Concepts

• Reading a displacement vs. draft graph (x-axis vs. y-axis) • Understanding that a straight diagonal line indicates a direct proportion between draft and displacement • Using interpolation from the scale marks rather than guessing by eye

💭 Think About

• Start at the displacement value of 3000 tons on the horizontal axis and trace straight up until you hit the diagonal line. From that intersection, where do you go next to find the draft? • Notice the labeled grid lines: what draft corresponds to 1000 tons, 2000 tons, and 4000 tons? Based on that pattern, what should 3000 tons line up with? • Are the intervals between both the draft values and displacement values evenly spaced? How does that help you avoid estimating incorrectly?

✅ Before You Answer

• Be sure you are reading displacement on the bottom (horizontal) axis and mean draft on the left (vertical) axis—don’t mix them up. • Confirm that each grid square on the horizontal axis represents the same increase in tons, and each grid square on the vertical axis represents the same increase in feet of draft. • After you find the draft that lines up with 3000 tons, compare it carefully with the exact choices given; don’t round to the nearest if an exact match exists.