Question

11. x (years since 1991)
2 5 7 8
y (book sales billions $) 18 21 23 24


Using the equation for this table and linear extrapolation, predict the book sales, in billions of dollars, in 2010, using data from the previous question. (Note that x is the number of years after 1991.)

(Points : 1)
35 billion
48 billion
72 billion


12. Write an equation in slope-intercept form of the line with an x-intercept of 6 and a y-intercept of 5.(Points : 1)
y = 6x + 5
y = -5/6 x + 5
y = -6x + 5
y = 5/6 x + 5

Answer 1

y = x + 16
2010 is 19 years after 1991
y = 19 + 16
y = 35 billion

Answer 2

(6, 0) (0,5)
(5 - 0) = 5
(0 -6) = -6
y = -5/6x + 5