Childhood weight A baby weighs 10 pounds at birth, and three years later the child’s weight is 30 pounds. Assume that childhood weight W (in pounds) is linearly related to age t (in years).
(a) Express W in terms of t.
(b) What is W on the child’s sixth birthday?
(c) At what age will the child weigh 70 pounds?
(d) Sketch, on a tW-plane, a graph that shows the relationship between W and t for 0 ≤t ≤12.
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