Q23Single correct3 Marks3 Dec 2023

Let $f$ be a differentiable function such that $f(4)=6$ and $f'(4)=-2$. What is the approximated value of $f(4.2)$ using the linear approximation of $f$ at $x=4$?

A

5.3

B

5.4

C

5.5

D

5.6