**Study Abstract**

After birth,
an infant is known to lose weight for a few days before starting to grow. We
make use of this information in order to develop a mathematical lesson that
illustrates the concept *minimum* of a function. At the same time, this
lesson will allow one to learn the use of calculus in real situations.

When monitoring the health of a newborn baby, it is very important for a medical practitioner to know, roughly, when a baby should stop losing weight. For, if a baby continues to lose weight beyond the day determined by available medical data, that may be worrisome and measures should be taken to ensure the well-being of the baby.

First,
we will suppose that the functional relationship between the weight of
a baby and the number of days from birth is known. Then,
we will estimate the day on which the weight of the baby will be We
will demonstrate how to employ the idea of "derivative" ( Then, we will determine that minimum weight. The newborn baby will start to grow beyond the day on which the minimum weight occurs. |