The engine displacements (in cubic inches) and the fuel efficiencies (in miles per gallon) of seven automobiles

(a) x = 86 cubic inches

(b) x = 198 cubic inches

(c) x = 289 cubic inches

(d) x = 407 cubic inches

Find the equation of the regression line for the data. Then construct a scatter plot of the data and draw the regression line. (Each pair of variables has a significant correlation.) Then use the regression equation to predict the value of y for each of the x-values, if meaningful. If the x-value is not meaningful to predict the value of y, explain why not. If convenient, use technology.

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Displacement, x 170 134 220 305 109 256 322 Fuel efficiency, y 29.5 34.5 23.0 17.0 33.5 23.0 15.5