A pediatrician records the age x (in yr) and average height y (in inches) for girls between the ages of 2 and 10. Height (in.) 50- y Height of Girls vs. Age (7,48) 40- (3,38) 30- 20 10- 2 6 8 10 Age(yr) X (a) Use the points (3, 38) and (7, 48) to write a linear model for these data. (b) Interpret the meaning of the slope in the context. (c) Use the model to forecast the average height of 11-yr-old girls. Round all calculations to the nearest hundredth of an inch, if necessary. (d) If the height of a girl at age 11 is 90% of her full-grown adult height, use the result of part (c) to estimate the average height of adult women. Round to the nearest tenth of an inch. CYDIANATION.