Estimate the derivative of the function $f ( x ) = 8 - 8 x$ at the point $x = 9$ .
Select the answer rounded to the nearest whole number.

A)-9
B) -10
C) -8
D) -7
E) -13

Question

Estimate the derivative of the function $f ( x ) = 8 - 8 x$ at the point $x = 9$ .  
Select the answer rounded to the nearest whole number.
 
A)-9
B) -10
C) -8
D) -7
E) -13

Quizplus · Accepted Answer

The derivative of $f(x) = 8 - 8x$ with respect to $x$ is $f'(x) = -8$, which is constant and does not depend on the value of $x$. Therefore, at $x = 9$, the derivative is $-8$.

Estimate the Derivative of the Function f(x)=8−8xf ( x ) = 8 - 8 xf(x)=8−8x

Estimate the Derivative of the Function $f ( x ) = 8 - 8 x$