PC 9.1-9.2 Circle and Parabola Properties

Front

What are the coordinates of the center and the radius of the circle with equation:
(x - 4)² + (y - 3)² = 25 ?

Back

Center (4,3)
Radius = 5 units

Front

Which is the equation of a circle with center (2, 1) that passes through (2, 4)? Options: (x – 2)² + (y – 1)² = 9, (x – 2)² + (y – 1)² = 3, (x + 2)² + (y + 1)² = 9, (x + 2)² + (y + 1)² = 3

Back

(x – 2)² + (y – 1)² = 9

Front

Back

(x - 3)²  + (y + 4)² = 9

Front

Which way does the parabola open?              (y - 4)² = -8(x+1)  

Back

left

Front

What is the value of p?  
(y - 4)² = -8(x+1)  

Back

2

Front

What is the focus of the following parabola?
(y + 5)² = -12 (x - 2)

Back

(-1, -5 )

Front

What are the coordinates of the focus? Options: (-9, 2), (-5, 2), (-7, 2), (-3, 2)

Back

(-9, 2)

Front

All parabolas with a vertical directrix open the left or right.

Back

true

Front

(x+3)² = 4(y+5)
What is the equation of the directrix?

Back

y = -6

Front

The focus is at (2,0) and the vertex is at (-4,0). What is the equation of the parabola?

Back

y² = 24(x+4)