alleryFind equation of tangent to y = x² - 1 at point (2, 3):
Ay = 3
By = x + 1
Cy = 2x
Dy = 4x - 5 (slope = 2x = 4)
Answer & Solution
Correct answer: D. y = 4x - 5 (slope = 2x = 4)
y' = 2x.
At x = 2: slope = 4. Tangent: y - 3 = 4(x - 2) → y = 4x - 5.
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