6. The number of copies of a book sold the year it was released was 600,000. Each year after that, the number of copies sold decreased by . a. Complete the table showing the number of copies of the book sold each year. years since published number of copies sold b. Write an equation representing the number of copies, c, sold y years after the book was released. 1 C. Use your equation to find c when y = 6. What does this mean in terms of the book? 3 y

In 1960, there were 242,900 immigrants admitted to a country. In 2005, the number was 1,011,507. a. Assuming that the change in immigration is linear, write an equation expressing the number of immigrants, y, in terms of t, the number of years after 1900. b. Use your result in part a to predict the number of immigrants admitted to the country in 2013. c. Considering the value of the y-intercept in your answer to part a, discuss the validity of using this equation to model the number of immigrants throughout the entire 20th century. a. A linear equation for the number of immigrants is y=. (Type your answer in slope-intercept form. Type an expression using t as the variable. Use integers or decimals for any numbers in the equation. Type an integer or decimal rounded to two decimal places as needed.)

Write an equation to relate the cost C to the number of pounds p. Number of Pounds Total Sales $10 6 $15 $20 10 12 AC = 10n p = 10n p= 2.5C IC= 2.5p