The weight, W, in lbs, of a child is a function of its age, a, in years, so W = f(a)
Explain what f ′(8) = 5 tells you in terms of age and weight _________________________ ?
a. 
when the child was age 7 the child weighed 5 pounds less that he or she did at age 6. 

b. 
The child is growing about 5 lbs/year at age 8 

c. 
At age 8 the child is growing about 4 lbs/year 

d. 
at age 5 the child`s weight will be increasing at 8 lbs/year 

e. 
None of these 
The weight W in lbs of a child is a functi...
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