Use the graph to answer the question. The cost of mailing a package from the United States to Western Europe is a function of its weight as shown in the graph Describe the continuity of this cost function.

Cost function is Discontinuous.
Since, The shown graph of cost function is function of greatest integer function and greatest integer function continuous from the left and from the right discontinuous at integer. Hence, the greatest integer function is discontinuous at all integers.
So, cost function is Discontinuous.
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