VOCABULARY
AXIS OF SYMMETRY
VERTEX
Key Points
100
The u-shaped graph shown by a quadratic.
What is a PARABOLA?
100
This is the formula for the axis of symmetry.
What is x = -b/2a ?
100

The vertex of y = x^2 is this ordered pair.

What is (0,0)?

100

X intercepts of y= 2(x - 4)(x + 5)

(4, 0) (-5, 0)

200
The line that passes through the vertex and divides a parabola into two symmetric parts.
What is the AXIS OF SYMMETRY?
200
This is the axis of symmetry for the equation y = 2x^2 + 8x – 5.
What is x = -2?
200

y = 4(x-1)^2 + 7 has its vertex at this point

What is (1,7)?

200

Vertex of  y = (x+2)(x-2)

What is (4,0)?

300
The lowest or highest point on a parabola.
What is the VERTEX?
300
This is the axis of symmetry for y=3x^2+6x-2
What is x = -1?
300
The vertex of y = -4x^2 + 3 is this.
What is (0,3)?
300

Identify the axis of symmetry of the following graph.

What is x=2?

400

where a parabola crosses the x-axis.

What are x-intercepts?

400
This is the axis of symmetry for y = -4x^2 + 3.
What is 0?
400
This point is the vertex of y = -3x^2 + 18x - 13.
What is (3,14)?
400

The x intercepts of y = x^2 + 4x - 5 

(hint, find the vertex first)

What are (1, 0) and (-5,0)


Bonus points: Using the x-intercepts you found, rewrite the equation in intercept form

500
This is the standard form of a quadratic equation.
What is ax^2 + bx + c = 0 ?
500
This is the axis of symmetry for y = -2x^2 + 8x + 12.
What is x = 2?
500
The vertex of y = 2x^2 + 16x - 1 is this ordered pair.
What is (-4,-33)?
500

FINAL JEOPARDY: Using y = 2x^2 - 12x + 16

a) find the vertex

b) find the x-intercepts

c) find the y intercept

a) (3, -2)

b) (2, 0) , (4, 0)

c) (0, 16)


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