SOLUTION: An on-demand publisher charges $22.50 to print a 600 page book and $15.50 to print a 400 page book. Find a linear function which models the cost of a book C as a function of the nu

Algebra ->  Finance -> SOLUTION: An on-demand publisher charges $22.50 to print a 600 page book and $15.50 to print a 400 page book. Find a linear function which models the cost of a book C as a function of the nu      Log On


   

Question 1113703: An on-demand publisher charges $22.50 to print a 600 page book and $15.50 to print a 400 page book. Find a linear function which models the cost of a book C as a function of the number of pages p. Interpret the slope of the linear function and find and interpret C(0).
Answer by ikleyn(52788) About Me  (Show Source):
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A linear function which models the cost of a book C as a function of the number of pages p is


y = 15.50 + %28%2822.50-15.50%29%2F%28600-400%29%29%2A%28p-400%29,   or, equivalently,


y = 15.50 + %287%2F200%29%2A%28p-400%29.