PROBLEMS
10 The evolution of the value of a share during the 10 weeks following its purchase is described below.
reach $9. An increase in the price of oil then causes its value to fall during the 2 weeks
The value of the stock when purchased is $5. Over the next 3 weeks, its value increases to
subsequent shares, the share then reaching its minimum value, i.e. $2. The value of the share remains
constant for 3 weeks, then increases by $6 over the next 2 weeks.
We are interested in the function that associates the value (in $) of the action with the time (in weeks) elapsed since
its purchase.
a) Draw a possible graphical representation
of this function.
b) What is the domain of this function?
c) What is the codomain of this function?
d) What are the extrema of this function?
e) Describe using intervals the growth
of this function.
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