2.  y = ax2
 a > 1, vertical
stretch
 0 < a < 1, vertical
shrink
 a < -1, vertical
stretch with a
reflection over the
x-axis
 -1< a < 0, vertical
shrink with a
reflection over the
x-axis
 y = (x - h)2 + k
 VERTEX FORM
 h > 0, moves the
graph h space to the
right
 h < 0, moves the
graph h spaces to
the left
 k > 0, moves the
graph k space up
 k < 0, moves the
graph k space down

4. 

5.  The y-coordinate
of the vertex is
the minimum
value of the
function if a > 0
 The y-coordinate
of the vertex, is
the maximum
value of the
function if a < 0

6.  Find the vertex
 Find the axis of symmetry
 Decide whether it opens up or down
 Find one point on the parabola
 Find another point using the axis of
symmetry and your point

7.  Complete handout.
 Pages 638-639 #1-35 odd