<em>Since y is cost and x are books, you plug in the numbers that each question implies:</em>
<em>First, What is the change in the total cost for each book printed?</em>
<em>Well, we know the equation is linear, so the cost should be the same with each book. Let's plug in 2 numbers, and see how the cost changes:</em>
<em>for 1 book (x = 1)</em>
<em>1150+25(1)= 1175</em>
<em>For 2 books (x - 2)</em>
<em>1150+25(2) = 1200</em>
<em>Next, to find the change in total cost, subtract these 2 answers:</em>
<em>1200 - 1175 = 25</em>
<em>$25.00 is the change in total cost. Notice that this number is also the slope of this linear equation (the term in front of the x.</em>
<em>For the next question: What is the cost to get started ( before any books are printed )?</em>
<em>Well, for that, we set x = 0 since there are no books:</em>
<em>1150+25(0)= 1150</em>
<em>$1150.00 is the startup cost</em>
i gotchu son
