Find a Formula for the Slope of the Graph Of f

question 76

Multiple Choice

Find a formula for the slope of the graph of $f$ at the point $( x , f ( x ) )$ .Then use it to find the slope at the given point. $f ( x ) = \frac { 1 } { x + 4 } , \quad ( - 3,1 )$

• A) \(\begin{array} { l }
• m = \frac { 1 } { ( x + 4 ) ^ { 2 } } \\
• \text { At } ( - 3,1 ) , m = 1
• \end{array}\)
• B) \(\begin{array} { l }
• m = - \frac { 1 } { ( x + 4 ) ^ { 2 } } \\
• \text { At } ( - 3,1 ) , m = 1
• \end{array}\)
• C) \(\begin{array} { l }
• m = \frac { 1 } { ( x + 4 ) ^ { 2 } } \\
• \text { At } ( - 3,1 ) , m = - 1
• \end{array}\)
• D) \(\begin{array} { l }
• m = - \frac { 1 } { ( x + 4 ) } \\
• \text { At } ( - 3,1 ) , m = - 1
• \end{array}\)
• E) \(\begin{array} { l }
• m = - \frac { 1 } { ( x + 4 ) ^ { 2 } } \\
• \text { At } ( - 3,1 ) , m = - 1
• \end{array}\)

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