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

question 104

Multiple Choice

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