Digital ACT Math Practice Question #1471
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Vertex is at x = 3. f(3) = -9 + 18 - 2 = 7.
The parabola opens downward. The vertex occurs at x = -b/(2a) = -6 / (2*-1) = 3, which lies inside [0, 5]. Evaluating at vertex: f(3) = -(3)^2 + 6(3) - 2 = -9 + 18 - 2 = 7. Evaluating endpoints: f(0) = -2, f(5) = -25 + 30 - 2 = 3. The maxim...
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