The vertex is , the axis of symmetry is
-axis and containing the point
.
The axis of symmetry is -axis then the parabola is horizontal and it passes the point
since the parabola is opens right side.
\The general form of parabola is .
Substitute .
.
Substitute in
.
.
The focus of the parabola is .
\
Substitute and
.
The focus is .
Latus rectum is the line segment of a parabola perpendicular to axis which has both
\ends on the curve.
\The parabola equation is .
Obtain the points define the latus rectum is .
Substitute and
.
The points are and
determine the latus rectum.
The line is the directrix.
Graph :
\(1) Draw the coordinate plane.
\(2) Graph the parabola equation .
(3) Plot the vertex, focus, and the two points and
.
(4) Draw the directrix line.
\(5) Connect the plotted points with smooth curve.
\The parabola equation is and the two points are
and
.
.