VOCABULARY
AXIS OF SYMMETRY
VERTEX
GRAPHS
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

If a is negative, is the vertex is a max or min?

Ex) y = -x2 +2x - 3

Max

100

What does the graph of a parabola look like when a is less than zero?

opens downward: sad face

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 = 2x2 + 8x – 5.

What is x = -2?

200

y = 4x2 + 7 has its vertex at this point

What is (0,7)?

200

What does the graph of a parabola look like when a is greater than zero?

opens upward: smiley face 

300
The lowest or highest point on a parabola.
What is the VERTEX?
300

This is the axis of symmetry for y=3x2+6x-2

What is x = -1?

300

The vertex of y = x2 is this ordered pair.

What is (0,0)?

300

X - intercepts are also called.... List one other name

Zeros, quadratic roots, solutions

400

This is where a parabola crosses the x-axis.

What are x-intercepts, roots and zeros?

400

This is the axis of symmetry for y = -4x2 + 3.

What is 0?

400

This point is the vertex of y = -3x2 + 18x - 13.

What is (3,14)?

400

On a graph, what is the value of y at the solutions?

y = 0

500
This is the standard form of a quadratic equation.
What is ax^2 + bx + c = 0 ?
500

Why does the axis of symmetry equation always start with x=...?

Because it is a Vertical line 

500

The vertex of y = -4x2 + 3 is this.

What is (0,3)?

500

What are the solutions to the equation y = x2 - 1 ?

Hint: Make a table or graph in your graphing calculator!

x = 1, x = -1
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