The equation is
.
Compare this polar equation with standard form
.
Where
and
.
Substitute
in
.
.
Since
, so the conic is parabola.
Directrix is parallel to the polar axis at a distance
below the pole.
The vertex is at
.
The directrix is
.
Construct a table for different values of
.
![]() | \
![]() | \
![]() | \
![]() | \
![]() | \
![]() | \
![]() | \
![]() | \
Graph: \ \
\(1) Graph the polar co-ordinates. \ \
\(2) Plot the points. \ \
\(3) Connect the points to a smooth curve.
\.gif\")
The conic is parabola.
\The directrix is parallel to the polar axis at a distance
below the pole.
The vertex is at
.
\
.