Can we predict how fast a tennis player can hit a serve from the player's height? The following computer output and scatterplot describe the regression of fastest serve speed (in kilometers per hour) on the height (in meters) of 21 current male professional tennis players. Predictor Coef SE Coef P Constant 68. 81 60. 77 1.13 0.272 height (m) 84. 98 31 . 51 2.70 0.014 S = 8. 93380 R-Sq = 27.78 R-Sq (adj) = 23.9% 250 240- Fastest serve (km/hr) 230- 8. . s 220 . . 210 1.80 1.85 1.90 1.95 2.00 2.05 2.10 height (m)