When Sarah was 6 months old, she was 21 in. tall and her head had a diameter of 4.5 in. Now, at 20 years old, she is 6 ft. 1 in. tall and her head has a diameter of 7.65 in. If Sarah is typical, shoul

When Sarah was 6 months old, she was 21 in. tall and her head had a diameter of 4.5 in. Now, at 20 years old, she is 6 ft. 1 in. tall and her head has a diameter of 7.65 in. If Sarah is typical, should a person at 20 years of age be considered “similar” to herself at 6 months of age?