A sports-equipment researcher was interested in the relationship between the speed of a golf club (in feet per second) and the distance a golf ball travels (in yards). Information was collected on several golfers and was used to obtain the regression equation ŷ = 2x - 106, where x represents the club speed and ŷ is the predicted distance. What is the predicted distance of a ball that is hit with a club speed of 168 ft/sec?
Substitute the club speed, 168, for x in the regression equation: ŷ = 2(168) − 106 = 336 − 106 = 230. The predicted distance is 230 yards, which is choice C.
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