AP Calculus ABhardmcq1 pt

Let ff be a differentiable function such that f(3)=8f(3) = 8 and f(3)=2f'(3) = -2. Which of the following is the best approximation of f(3.1)f(3.1) using local linearity?

A.7.87.8
B.8.28.2
C.7.07.0
D.9.09.0

Explanation

Core Concept

Correct. Using the tangent line approximation: f(3.1)f(3)+f(3)(3.13)=8+(2)(0.1)=7.8f(3.1) \approx f(3) + f'(3)(3.1 - 3) = 8 + (-2)(0.1) = 7.8.

Correct Answer

A7.87.8

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