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Vocabulary
Misc.
x-intercepts
Axis of Symmetry
Vertex
100

What is the name for a U-shaped graph in the quadratic equation?

Parabola

100

y=-x2+16

what is a=? b=? c=?

a=-1 b=0 c=16

100

Name the x-intercepts (Give points where the parabola is crossing the x-axis) y=(x-2)(x+6)

(2,0) and (-6,0)?

100

What is the formula for the axis of symmetry?

x=-b/2a

100

Name the vertex y= (x-3)2 +4

What is (3,4)?

200

How do we call the highest or lowest point on a parabola.

Vertex

200

What is the x-intercept?

Point where the parabola crosses through the x-axis.

200

Name the x-intercepts. Give points where the parabola is crossing the x-axis. Y=(x)(x-2)

(0,0) and (2,0)

200

What does the axis of symmetry do?

Axis of symmetry cuts the quadratic equation in half.

200

y= (x+1)2 - 8

What is (-1, -8)?

300

What is the name of the form for this quadratic equation? y = ax2 +bx + c

Standard form

300

What can the sign of the coefficient of an "a" term tell you about the behavior of the parabola? ax^2 +bx + c

The a term tells you whether the parabola is facing upward or downward.

300
Name the x-intercepts. Give points where the parabola is crossing the x-axis. y=x^2 - 4
(-2,0) and (2,0)
300

What is the axis of symmetry for this quadratic function? y=x2 + 4x + 4

x=-2

300

y=(x+4)(x-4)

What is (0,-16)?

400

When the vertex is in the lowest part of the parabola, what is it called?

The minimum

400

What can the coefficient of an "a" term tell you about the behavior of the parabola? ax^2 +bx + c

a>1 makes the parabola shrink (skinner) a <1 makes the parabola stretch (fatter)

400

Name the x-intercepts. Use factoring, graphing or quadratic formula to find the points where the parabola crosses through the x-axis. y=x2 - x - 2

(-1,0) and (2,0)

400

What is the axis of symmetry for this quadratic function? y=x2 -6x +9

x=3

400

Name the vertex x2 - 4x - 5 = 0

What is (2,-9)?

500

How do we call the line that runs through the vertex and divides the parabola in half.

Axis of symmetry or line of symmetry

500

Name at least 3 steps that you need to take to graph the quadratic function.

1. Find the axis of symmetry (Find x) 2. Find the value of y 3. Find vertex (x,y) 4. Plot vertex 5. Plot axis of symmetry 6. Use T-chart to plot at least 2 points 7. Use axis of symmetry to plot remaining points

500

Name the x-intercepts. 4x2 +16x -20 

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

500

What is the axis of symmetry for this quadratic function? x2 + 1 = 2x

x = 1

500

Name the vertex 2x2 + 4x - 6 = 0?

What is (-1,-8)?