Question

PLEASE HELP THANK YOU

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
=
y
+
15
x
1200

.


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.

Answer 1

Answer:

change in the total cost for each book printed = $15

cost to get started (before books are bought) = $1200

Step-by-step explanation:

IF the eqn is y = 15x +1200

where y  represent the total cost of publishing a book (in dollars) and

x  represent the number of copies of the book printed

then cost to get started (before books are bought) can be found by substitute x=0 into the eqn

y = 1200 + 15*0 = $1200

change in the total cost for each book printed will be the difference in total cost at x=0 and x=1

when x=0, y=1200

when x=1, y=1200+15*1=1215

so the change in total cost=$15