Axis of symmetry

What is the equation for axis of symmetry?

• y = 3

• x = 3

• x = 5

• x = 1

What is the axis of symmetry?

• the slope of the graph

• the vertical line for a parabola

• a way to spin my pencil

• the x-axis

What is the vertex of y= x² + 4x + 3?

Hint: Find Axis of Symmetry 1st.

• (2,1)

• (-2,1)

• (0,0)

• (-2,-1)

What is the axis of symmetry y = 4x² + 8x + 8?

• x = -1

• x = 1

• x = 2

• x = -2

Find the axis of symmetry for y = x² - 8x + 15.

• x = -4

• x = 4

• y = 4

• y = -4

A parabola has a vertex at (-3,2).
Where is the axis of symmetry?

• y = -2
• x = 3
• x = -3
• y = 2

What is the axis of symmetry for this graph?

• y = 2

• x = 2

• x = 0

• y = 0

The formula for the axis of symmetry line is x = -b/(2a)

• true

• false

If the "a" value is positive, which direction does the graph open?

• up

• down

• left

• right

If the "a" value is negative, which direction does the parabola open?

• up

• down

• left

• right