The following data are the wellhead prices for domestically produced natural gas, in dollars per thousand cubic feet, from 1987 through 1994. Given these data and the trend equations shown here, use the MAD criterion to determine which equation is the better fit. Repeat the evaluation, using the MSE criterion.

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y = х Year Year Code Price Linear: $1.67 1987 ý = 1.474 + 0.0769x 1988 2 1.69 1.69 1989 3 Quadratic: 1990 4 1.71 ý = 1.844 – 0.145x + 0.0246x2 1991 1.64 1992 6. 1.80 1993 2.09 1994 8. 2.27