Problema Solution
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
y
are related by the equation
=+10x1200y
.
Answer the questions below.
Note that a change can be an increase or a decrease.
For an increase, use a positive number. For a decrease, use a negative number.
what is the change in the total cost for each book printed?
what is the cost to get started (before books are bought)?
Answer provided by our tutors
Lets assume the equation is: y = 10x + 1200
We find the cost to get started by plugging x = 0 into the above equation:
y = 10*0 + 1200
y = $1200
The cost to get started is $1200.
The cost for 1 book printed is, that is for x = 1 we have:
y = 10*1 + 1200
y = $1210
The change in total cost of each book printed is 1210 - 1200 = $10.