Explanation:
This equation states that the total cost of publishing a book (y) is equal to the sum of the fixed costs (1100 dollars) and the variable costs (15 dollars per copy of the book printed, represented by 15x).
So, for any given number of books printed (x), the total cost can be found by substituting x into the equation:
y = 15x + 1100
For example, if the book is printed 500 times, the total cost would be:
y = 15 * 500 + 1100 = 8500 dollars.