The function f(x) = 1.1x³ - 35x² + 264x + 557 models the number of discharges, f(x), under “don’t ask, don’t tell” x years after 1994. Use this model and its graph, shown below, to solveExercises 29–30.a. Find the slope of the secant line, rounded to the nearest whole number, from x₁ = 0 to x₂ = 4.b. Does the slope from part (a) underestimate or overestimate the average yearly increase that you determined in Exercise 27? By how much?

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Number of Discharges 1200 1100 1000 900 800 700 600 T 01 (4, f(4)) Graph of a Model for Discharges under "Don't Ask, Don't Tell" ⠀ (0, f(0)) 2 f(x) = 1.1x³ - 35x² + 264x + 557 3 (7, f(7)) 4 5 6 7 8 Years after 1994 (12, f(12)) 9 10 11 12 13 X