Circles and Parabolas

• Center:  (-2, 6), Radius:  9

• Center:  (-2, 6), Radius:  3

• Center:  (2, -6), Radius:  3

• Center:  (2, -6), Radius:  9

What is the equation for the circle shown here?

• focus:  (4, 6)        directrix:  y = 0

• focus:  (4, 0)        directrix:  y = 6

• focus:  (4, 2.67)        directrix:  y = 3.33

• focus:  (-4, 0)       directrix:  y = 6

What is the equation for the parabola shown in the image?

Which of the following parabolas open horizontally? Select all that apply

6x² + 6y² – 3x + 4y = 0

• Circle

• Parabola

• Hyperbola

• Ellipse

Identify the conic:  2x² + 6y – 9 = 0         

• Parabola Opens Up

• Parabola Opens Down

• Vertical Ellipse

• Horizontal Ellipse

What is the equation of a circle with radius 2 and center (3, 4)?

• (x+3)² + (y+4)² = 2

• (x-3)² + (y-4)² = 2

• (x+3)² + (y+4)² = 4

• (x-3)² + (y-4)² = 4

Identify the vertex

• (-1,-9)

• (0,-8)

• (-4,0)

• (0,0)

The radius is....

• a line that crosses through the center and touches each edge 

• the center point of a circle 

• a line from the center point to the edge of the circle

• an element in science