The fuel consumptions of a 3000-TEU ship that travels from Singapore to Jakarta, Indonesia, are shown in Table 58 for various speeds.

Let y be fuel consumed (in tons per day) by a ship that travels at a rate of x knots.
a. Construct a scatterplot.
b. Is the association positive, negative, or neither? What does that mean in this situation?
c. Find the exponential regression equation.
d. In part (b), you described the direction of the association. Now describe the other three characteristics of the association.
e. Predict the fuel consumption of a 3000-TEU ship that travels at 18 miles per hour. A knot is equivalent to 1 nautical mile per hour, there are 2025 yards in 1 nautical mile, and there are 5280 feet in 1 mile.

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Table 58 Ship Speeds and Fuel Consumptions Speed (knots Fuel Consumption (tons per day 15.4 15.7 16.3 16.6 38 39 43 45 50 56 176