The Professional Golfers Association (PGA) maintains data on performance and earnings for members of the PGA Tour. For the season Bubba Watson led all players in total driving distance, with an average of yards per drive. Some of the factors thought to influence driving distance are club head speed, ball speed, and launch angle. For the season Bubba Watson had an average club head speed of miles per hour, an average ball speed of miles per hour, and an average launch angle of degrees. The Datafile named PGADrivingDist contains data on total driving distance and the factors related to driving distance for members of the PGA Tour (PGA Tour website, November , ). Descriptions for the variables in the data set follow. Club Head Speed: Speed at which the club impacts the ball (mph). Ball Speed: Peak speed of the golf ball at launch (mph). Launch Angle: Vertical launch angle of the ball immediately after leaving the club (degrees). Total Distance: The average number of yards per drive. Click on the datafile logo to reference the data. a. Develop an estimated regression equation that can be used to predict the average number of yards per drive given the club head speed (to 4 decimals). 124.716 1.394 b. Develop an estimated regression equation that can be used to predict the average number of yards per drive given the ball speed (to 4 decimals). 74.77