Sarah is self-publishing her 300-page novel and wants to estimate the printing costs.

She looks up printing costs for other paperback books and plots the number of pages (x) against the cost (y) in dollars.

Answer the questions to estimate the cost of printing a 300-page paperback book.


1. What is the y-intercept for the trend line? What is the real-world meaning of this point?
















2. One point on the trend line is (200, 6). Using this point and the y-intercept, find the slope of the trend line. Show your work.
















3. What is the real-world meaning of the slope?















4. Use the slope and y-intercept to write an equation for the trend line in slope-intercept form.







5. Use your equation to estimate the cost of printing Sarah's 300-page book.