Vertex:
Vertex:
Vertex:
Vertex:
A of S:
A of S:
A of S:
A of S:
Focus:
Focus:
Focus:
Focus:
Directrix:
Directrix:
Directrix:
Directrix:
Ex1: The vertex of a parabola is (-5,1) and the directrix is the line y = -2. Find the
focus of the parabola.
Ex1: The vertex of a parabola is (-5,1) and the directrix is the line y = -2. Find the
focus of the parabola.
Ex2: Find an equation of the parabola having the point F(0,-2) as focus and the
line x = 3 as directrix. Draw the curve and label the vertex, focus, directrix, and
axis of symmetry.
Ex2: Find an equation of the parabola having the point F(0,-2) as focus and the
line x = 3 as directrix. Draw the curve and label the vertex, focus, directrix, and
axis of symmetry.
Ex3: Find the vertex, focus, directrix, and axis of symmetry of the parabola,
y2 – 12x -2y + 25 = 0. Then graph the parabola.
Ex3: Find the vertex, focus, directrix, and axis of symmetry of the parabola,
y2 – 12x -2y + 25 = 0. Then graph the parabola.
Ex4: Find an equation of the parabola that has vertex (4,2) and directrix y = 5.
Ex4: Find an equation of the parabola that has vertex (4,2) and directrix y = 5.