8A-Everett-DSA-Axis of Symmetry Vertex

8A-Everett-DSA-Axis of Symmetry Vertex

by William Everett

You will upload your final answers to Teams.

​

If you don't have a pencil and paper to calculate, please get one now.

Symmetry is he quality of being made up of exactly similar parts facing each other or around an axis

Multiple Select

What is the green dot on the parabola called?

• maximum
• minumum
• vertex

• origin

Multiple Choice

Find the vertex  y = x² - 2x - 5

• V(-2, 10)
• V(-1, 15)
• V(1, -6)
• V(1, -12)

Multiple Choice

What is the green dashed line called?

• roots or x-intercepts
• parabola
• axis of symmetry
• line of dashes

Multiple Choice

What is the axis of symmetry for this graph?

• y=2
• x=2
• x=0
• y=1

​The vertex of a parabola is the highest or lowest point on a parabola

​We call them maximum (highest) and minimum (lowest)

​The vertex of a parabola is the highest or lowest point on a parabola

​The vertex is a point.

​It has an x-coordinate and a y-coordinate

Multiple Choice

What is the vertex of this parabola?

• x = 2

• (-4, 2)

• (2, -4)

• (1, -1)

You use the axis-of symmetry to find the y-value of the vertex.

Multiple Choice

What are the steps to find the vertex of a parabola?

• calculate $$x\ =\ -\ \frac{b}{2a\ }$$  

• Calculate $$x\ =\ -\frac{b}{2a}$$   then replace x in the original equation to find y

• Use the quadratic formula

• guess and check

​The axis of symmetry is NOT the vertex.

​It is only the x-value of the vertex.

Multiple Choice

Find the vertex  y = x² - 2x - 5

• V(-2, 10)
• V(-1, 15)
• V(1, -6)
• V(1, -12)

Multiple Choice

What is the equation for axis of symmetry?

• y=3
• x=3
• x=5
• x=1

Multiple Choice

The line that goes through the vertex of a parabola is called the...

• Vertex
• Axis of Symmetry
• x-intercept
• y-intercept

Multiple Choice

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

• y = -2
• x = 3
• x = -3
• y = 2

Multiple Choice

What is the vertex?

• (4,-4)
• (2,0)
• (0,2)
• (6,0)

​Almost done!

​Upload a screenshot of your final score to Teams.