ACT Math Practice Question #1454 (Medium (30)) | Test Citadel
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ACT Math Difficulty: Medium (30)

Digital ACT Math Practice Question #1454

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What is the vertex of the parabola given by the equation y = -2x^2 + 12x - 11?
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x = -12/(-4) = 3. y = -18 + 36 - 11 = 7. Vertex = (3, 7).

Masterclass Solution & Distractor Trap Analysis

X_v = -b / (2a) = -12 / (2 * -2) = -12 / -4 = 3. y_v = -2(3)^2 + 12(3) - 11 = -2(9) + 36 - 11 = -18 + 36 - 11 = 7. Vertex is (3, 7)....

Distractor Analysis: Trap choice eliminates careless test-takers who confuse roots with coordinates...

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