Parabola

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

• true

• false

When x is squared, the parabola opens up or down.

• True

• False

(y-4)² = -8(x+1)
What are the coordinates for the focus?

• (1,4)

• (-1,6)

• (-1,2)

• (-3,4)

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

• x = 4

• x = 2

• y = -4

• y = -6

Which direction does this parabola open?

• Up

• Down

• Left

• Right

The vertex is halfway between the focus and directrix.

• true

• false

• Intercept form

• Standard form

• Vertex form

• Factored form

Select the equation that matches the graph.

Answer explanation

Find the vertex and plug values into equation

• Upward facing, narrow

• Downward facing, narrow

• Upward facing, wide

• Downward facing, wide

Answer explanation

a value = -2

Select the equation that matches the graph.

Answer explanation

Find the vertex and plug values into equation