$\"\"$

The polar equation is $\"\"$ .

$\"\"$

Substitute $\"\"$ and $\"\"$ .

$\"\"$

The equation is in the form of $\"\"$ .

The graph of this equation is a line with slope $\"\"$ .

$\"\"$

Evaluate the function for several values of $\"\"$ in its domain and use this points to graph the function.

Graph :

(1) Draw the coordinate plane.

(2) Graph the function $\"\"$ . \ \

$\"\"$ .

$\"\"$

The rectangular equation is $\"\"$ .

Graph of the function $\"\"$ is \ \

$\"\"$ .