Concept explainers
Quick-Talk advertises monthly cellualr phoneservice for
a. Make one graph showing the cost per minute as a function of number of minutes and the other showing the total cost for calls as a function of the number of minutes up to
b. If you connect the points in the secong graph in part (a), what kind of assumptions needs to be made about the way the telephone company charges phone calls?
c. Why does the total cost for calls consist of two line segments? Why is one part steeper than the other?
d. The function representing the total cost for calls as a function of number of minutes talked can be represented by two equations. Write these equations.
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