Brain Weight The average weight of a male child’s brain is 970 grams at age 1 and 1270 grams at age 3. (Source: American Neurological Association)
(a) Assuming that the relationship between brain weight y and age t is linear, write a linear model for the data.
(b) What is the slope and what does it tell you about brain weight?
(c) Use your model to estimate the average brain weight at age 2.
(d) Use your school’s library, the Internet, or some other reference source to find the actual average brain weight at age 2. How close was your estimate?
(e) Do you think your model could be used to determine the average brain weight of an adult? Explain.
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