Given that y = 2x – 1 and Δx = 0.1, find Δ y
-
0.20
- 0.15
- 0.10
- 0.05
The correct answer is: 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.