1. 4.2: Graphs of Quadratic Functions in Vertex or Intercept Form
Objectives:
To graph quadratic functions in vertex and intercept form
To rewrite a quadratic equation in standard, vertex, or intercept form

2. Graphing Quadratic Functions, II
To graph y = a(x – h)2 + k :
Use the a-value to determine  or 
Plot the vertex (h, k)
Graph the axis of symmetry x = h
Find and plot at least two other function values and their reflections
x- and y-intercepts?
Draw a parabola through the points

3. Exercise 1 Graph First find the axis of symmetry
Remember y = a(x – h)2 + k
Axis of symmetry
x= h
And x = -2
GRAPH X= -2

4. Exercise 1
Graph
Now find the vertex. (h,k)
(-2,3) Plot the point.

5. Exercise 1 Graph Now find the vertex. (h,k)
Pick two values for x and find its matching coordinate point for y.
x=-1 y = -(-1+2)^2 + 3
= -(1)^2 + 3
= = 2
Plot (-1, 2)

6. Exercise 1 Graph Now find again when x = 0 x=0 y = -(0+2)^2 + 3
= -(2)^2 + 3
= = -1
Plot (0, -1)

7. Exercise 1
Graph
REFLECT(MIRROR)
THE POINTS!!