Focus of Parabola

How do we define a parabola using its focus and directrix?

• A parabola is the set of all points that are the same distance from a single point, called the focus of the parabola, and a line, called the directrix of a parabola.

• A parabola is the set of all points that have a greater y value than a single point, called the focus of the parabola, and a lesser x value than a single point, called the directrix of the parabola.

• A parabola is a circle with a center point called the focus of the parabola, and a line from the center of the circle to the circle called the directrix of the parabola.

• A parabola is a square in which the center of the square is called the focus of the parabola, and the length of one side of the square is called the directrix of the parabola.

Each point on the curve of a parabola is ____________ to focus and the directrix.

• equilateral

• perpendicular

• equidistant

• tangent

What is the standard form of the equation of the parabola with Focus: (0, 7) and the vertex at the origin?

What is the standard equation of a parabola with Vertex (4,3) and the focus is 2 units above the vertex?

What is the standard equation of a parabola with Focus (1,3) and the directrix is 6 units to the left of the focus?

What is the standard equation of a parabola with Focus (2,5) and the directrix is 6 units to the right of the focus?

Given the graph below, what is the equation of the parabola?

What is the point inside the parabola 'p' units from the vertex?

• vertex

• focus

• directrix

• axis of symmetry

If the directrix is y = 4 and the focus is at 
(3, 0), the value of p is:

• 8

• -8

• 2

• -2

Find the vertex, focus, and directrix of the parabola: x² = 28y

• Vertex: (0, 0) Focus: (0,7) Directrix: y=-7

• Vertex: (0, 0) Focus: (7,0) Directrix: y=7

• Vertex: (0, 0) Focus: (0,-7) Directrix: x=-7

• Vertex: (0, 0) Focus: (7, 0) Directrix: x=7