Vocabulary
Standard Form
Graphs of Parabolas
Vertex / Standard
100
The name of the graph of a quadratic function.
Parabola
100
The standard form of a quadratic function.
y=ax2+bx+c
100
The vertex of the graph.
(2,4)
100
y=(x-4)2 in standard form
y=x2-8x+16?
200
The vertical line that cuts the parabola into two mirror images.
Axis of symmetry
200
This is the y-intercept in standard form.
c
200
The x intercepts
(-3,0) and (1,0)
200
y=3(x+1)2 in standard form
y=3x2+6x+3?
300
The lowest or highest point on the parabola.
Vertex
300
This tells you whether the parabolas goes up or goes down
a
300
The y intercept
(0,0)
300
y=x2+6x+4 in vertex form
y=(x+3)2-5?
400
y=-2(x-1)2+3 in standard form
y=-2x2+4x+1?
500
y=5x2+20x+10 in vertex form
y=5(x+2)2-10 ?