e function f x 1 3x 36x 261x 553 below models the number of discharges from the military f x of active duty gay service members under the do k don t tell policy x years after 1994 Complete parts a and b Number of Discharges 1400 900 400 0 4 f 4 0 f 0 4 Years after 1994 10 Q a Find the slope of the secant line from x 0 to X 4 The slope of the secant line is Round to the nearest whole number as needed