Find a formula for the slope of the graph of $f ( x ) = \frac { 7 } { x + 4 }$ .
A) $\frac { 7 } { ( x + 4 ) ^ { 2 } }$
B) $\frac { 7 } { x + 4 }$
C) $- \frac { 1 } { 7 ( x + 4 ) ^ { 2 } }$
D) $- \frac { 7 } { ( x + 4 ) ^ { 2 } }$
E) $- \frac { 7 } { x + 4 }$

Question

Quizplus · Accepted Answer

The slope of the graph of $f(x) = \frac{7}{x+4}$ can be found by differentiating the function with respect to $x$, which gives $f'(x) = -\frac{7}{(x+4)^2}$.

Find a Formula for the Slope of the Graph Of f