Let's consider what the question asks for:
--> change in total cost for each book printed
--> cost to get started
The change in total cost:
--> essentially, the slope value that is given in the equation:

--> thus, the change in total cost per book is $25
The cost to get started before printing any books:
--> we can essentially set 'x' equal to 0 to signify no books being printed
yet

--> the total cost before printing any books is $1150
Answer:
- change in total cost for each book printed: $25
- total cost before printing any book: $1150