Find the Slope of the Polar Curve at the Indicated $$\mathrm { r } = 9 , \theta = \frac { \pi } { 2 }$$

Multiple Choice

Find the slope of the polar curve at the indicated point.
- $$\mathrm { r } = 9 , \theta = \frac { \pi } { 2 }$$

A) 1
B) $- \frac { \sqrt { 3 } } { 3 }$
C) $- \sqrt { 3 }$
D) 0