The average cost for printing x copies of a self-published paperback book with Company A is ()=120+4 c
(
x
)
=
120
+
4
x
x
. The average cost for printing x copies of a paperback book with Company B is ()=25+102
d
(
x
)
=
25
+
10
x
2
x
.

1. Which company would you recommend to an author who wants to print 100 books? Explain your reasoning.

2. Which company would you recommend to an author who thinks their book will be a best seller and needs to print thousands of books? How could you rewrite the equations to make the choice clearer?