The accompanying data were compiled by the admissions office at carter college during the past 5 yr. the data relate the number of college brochures and follow-up letters (x) sent to a preselected list of high school juniors who took the psat and the number of completed applications (y) received from these students (both measured in thousands).
brochures sent, x 1.1 2 2.2 2.4 3.8
applications completed, y 0.3 0.5 0.9 0.58 1.9
(a) determine the equation of the straight line l that passes throught the points (2, 0.5) and (2.4, 0.58).
y =
(b) use this equation to predict the number of completed applications that might be expected if 6900 brochures and follow-up letters are sent out during the next year. (give your answer correct to the nearest full application.)