vocabulary
what is aos?
vertical line divides parabola in half
y = 2x2 - 4
stretch by a factor of 2
all real numbers
y = - x2 + 5
reflection
what is the vertex?
y = x2 - 3
( 0 , -3 )
what is the y-intercept?
where parabola crosses y-axis
y = 1/2x2 + 2
shrink by a factor of 1/2
translation (2)
y = x2 - 5
* reflection
* moved down 5
what are roots?
x-intercepts (where parabola crosses x-axis)
y = x2 + 3
a = 1; parent function
vertex
y = 1/2x2 + 2
( 0 , 2 )
no, the parabola may not cross the x-axis
y = - 1/4x2 + 10
* shrink by a factor of 1/4
* reflection
aos
y = 2x2 + 2
x = 0