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 on the domain [0, 12], to solve Exercises.
a. Find the slope of the secant line, rounded to the nearest whole number, from x1 = 7 to x2 = 12.
b. Does the slope from part (b) underestimate or overestimate the average yearly decrease that you determined in Exercise? By how much?
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