Question

Let y represent the total cost of publishing a book (in dollars). Let x represent the number of copies of the book printed. Suppose that x and x are related by the equation .
what is the change in the total cost for each book printed?

what is the cost to get started (before any books are printed)?

Answer 1

equation y=1250+25x

Answer 2

Let's say you don't print any books, and just get it set up (part 2):
x (books printed) = 0,
so y (cost) = 1250 + 25(0) = 1250

Answer 3

so 1250 dollars for the second one?

Answer 4

Yes.

Answer 5

what is the first one then

Answer 6

Let's say you print just 1 book. The total cost would be:
y = 1250 + 25(1) = 1275

What's the difference in cost between printing 1 book and 0 books?

Answer 7

25 dollars

Answer 8

Yup. That is the change per book printed, the answer to part 1.

Answer 9

thanks