Correct Answer: Option A

Explanation

Given the function y = 2x − 1 and  Δ x = 0.1.

Δy = f(x - Δx) - f(x) = [(2(x + 0.1) − 1) − (2x − 1)]

Δy = 2x + 0.2 - 1 - 2x + 1 = 0.2.

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