Question

Last one tonight! Thanks for your help Iris!

Answer 1

Answer:

a) 1200

b) +15

Step-by-step explanation:

The given equation is

$y=15x+1200$

The cost to get started is the initial cost(y-intercept) which is $1200$.

The change in total cost for each book printed is the slope of the line which is $+15$

Answer 2

Hello!

The answers are:

• $1200
• $25(+)

Why?

For the first question, if there is no printed book, the variable x will be 0, so:

$y=1200+15x\\y=1200+15(0)$

The cost to get started, meaning that there is not any printed book, is $1200

For the second question, to determine the change in the total cost for each printed book, let's assume that there is just one book printed, so:

$y=1200+15x\\y=1200+15(1)=1215$

So, the change for each printed book is $15(+) because:

$Change=(1)BookPrintedCost-NoBookPrintedCost=1215-1200=15$

Have a nice day!