U3L2 in person A2CT

U3L2

Parabolas & Circles

Multiple Choice

What is the vertex of the parabola?

 $y=3\left(x-1\right)^2+4$  

• (-1,4)

• (4,-1)

• (1,4)

• (-1,-4)

Multiple Choice

What is the axis of symmetry of the parabola?

 $y=3\left(x-1\right)^2+4$  

• x=-1

• x=1

• x=4

• y=4

Fill in the Blank

Pick a point:

Plug in 0 for x and simplify. The number you get out is the y coordinate of the point. Enter your answer as a coordinate with no spaces. (#,#)

 $y=3\left(x-1\right)^2+4$  

Multiple Choice

What is the vertex of the parabola?

 $x=-2\left(y+1\right)^2-3$  

• (-3,-1)

• (-3,1)

• (1,-3)

• (-1,-3)

Multiple Choice

What is the axis of symmetry of the parabola?

 $x=-2\left(y+1\right)^2-3$  

• y=-1

• x=-1

• y=3

• y=-3

Fill in the Blank

Pick a point:

Plug in 0 for y and simplify. The number you get out is the x coordinate of the point. Enter your answer as a coordinate with no spaces. (#,#)

 $x=-2\left(y+1\right)^2-3$  

Multiple Choice

What is the radius of the circle given by the equation (x - 7)² + (y + 3)² = 25?

• 3

• 5

• 10

• 25

Multiple Choice

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

• Center (4, 3)

  Radius = 5 units

• Center (4, 3)

  Radius = 25 units

• Center (-4, -3)

  Radius = 25 units

• Center (-4, -3)

  Radius = 5 units

Multiple Choice

Write the equation of the circle with center C( -5 , 8 ) and radius = 7

• ( x - 5 )² + ( y + 8 )² = 14

• ( x - 5 )² + ( y - 8 )² = 49

• ( x - 5 )² + ( y + 8 )² = 49

• ( x + 5 )² + ( y - 8 )² = 49

Homework

Your homework is U3L2 worksheet #1,2,5,9,11,12

Please circle these numbers on your paper so you do not forget which ones you need to do.

This will be checked in class on Monday.