An algebra teacher is ordering new text books for the class. The shipping costy (in dollars) depends on the number of books that are ordered, as shown in the table. Write a linear model for this data.
Number of books
Shipping cost (in dollars)
6
30
8
34
10
38
12
42

The american academy of pediatrics wants to conduct a survey of recently graduated family practitioners to assess why they did not choose pediatrics for their specialization. provide a definition of the population, suggest a sampling frame, and indicate the appropriate sampling unit.