Medical: Fat Babies Modern medical practice tells us not to encourage babies to become too fat. Is there a positive correlation between the weight x of a 1-year-old baby and the weight y of the mature adult (30 years old)? A random sample of medical fi les produced the following information for 14 females:

x (lb) 21 25 23 24 20 15 25 21 17 24 26 22 18 19 y (lb) 125 125 120 125 130 120 145 130 130 130 130 140 110 115 Complete parts

(a) through (c), given x 5 300; y 5 1775; x2 5 6572; y2 5 226,125; xy 5 38,220

(d) If a female baby weighs 20 pounds at 1 year, what do you predict she will weigh at 30 years of age?