Vocabulary
Every quadratic equation has a U-shaped graph called this.
What is parabola?
x2 - 3x + 1 = 0
What is standard form?
Name the y-intercepts f(x)= x2+3x-4
(0,-4)
Name the vertex y= (x-3)2 +4
What is (3,4)?
f(x)= 3x2-5x+20
Open up
Minimum
y = 2 (x - 5)² + 6
What is Vertex form?
Name the y-intercept f(x)=2x2+10x-14
(0,-14)
y= (x+1)2 - 8
What is (-1, -8)?
f(x)= x2+3x-9
Minimum
When a quadratic equation is written in this form y = ax2 +bx + c
What is the standard form?
5x2 + x - 1 = 0
What is standard form?
Name the y-intercept. y=x2 - 4
(0,-4)
y=(x+4)(x-4)
What is (0,-16)?
f(x)=-2(x+4)2+3
Opens down
maximum
This is the number before the x2 that determines whether a parabola opens up or down.
What is the leading coefficient?
y = 2(x-1)(x+7)
What is intercept form?
Name the y-intercept f(x)=2(x+3)2+7
(0,25)
Name the vertex x2 - 4x - 5 = 0
What is (2,-9)?
f(x)=(2x-4)(-x+3)
Opens down
Mximum
The line that runs through the vertex and divides the parabola in half.
What is axis of symmetry?
y = - 1/2 (x + 7) - 4
What is vertex form?
Name the y-intercepts. y= (x-1)2 - 1
(0,0)
Name the vertex 2x2 + 4x - 6 = 0?
What is (-1,-8)?
f(x)=3(x-3)2+2
Opens up
minimum