Table 1 gives performance data for a boat powered by an Evinrude outboard motor. Use quadratic regression to find the best model of the form y = ax² + bx + c for fuel consumption y (in miles per gallon) as a function of speed x (in miles per hour). Estimate the fuel consumption (to one decimal place) at a speed of 12 miles per hour.

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Table 1 rpm 2,500 3,000 3,500 4,000 4,500 5,000 5,400 mph 10.3 18.3 24.6 29.1 33.0 36.0 38.9 mpg 4.1 5.6 6.6 6.4 6.1 5.4 4.9