By means of a scatter diagram, determine whether there is a relationship between hours of machine use and millimeters off the target. Data for 20 ( x , y ) pairs with hours of machine use as the x variable are (30, 1.10),

(31, 1.21), (32, 1.00), (33, 1.21), (34, 1.25), (35, 1.23),

(36, 1.24), (37, 1.28), (38, 1.30), (39, 1.30), (40, 1.38),

(41, 1.35), (42, 1.38), (43, 1.38), (44, 1.40), (45, 1.42),

(46, 1.45), (47, 1.45), (48, 1.50), and (49, 1.58). Draw a line for the data using eyesight only and estimate the number of millimeters off the target at 55 h.