December 01, 2015
3.3 Quadratic Functions
and Their Properties
Day 1
Objectives:
Graph a quadratic function using its vertex, axis of
symmetry and intercepts.
December 01, 2015
Finding Vertex and Axis of Symmetry
vertex (h, k)
aos: x = h
Another way to look at vertex and axis of symmetry
vertex:
Example 1:
up/down:
vertex:
aos:
aos:
December 01, 2015
Finding Intercepts
y-int: f(0), plug in 0 for x
x-int: f(x) = 0, quadratic formula/factoring
Example 2: Find the intercepts of the quadratic functions.
December 01, 2015
Example 3:
up/down:
vertex:
aos:
y-int:
x-int:
sketch a graph
domain:
range:
increasing:
decreasing:
December 01, 2015
Example 4:
up/down:
vertex:
aos:
y-int:
x-int:
sketch a graph
domain:
range:
increasing:
decreasing:
December 01, 2015
Example 5:
up/down:
vertex:
aos:
y-int:
x-int:
sketch a graph
domain:
range:
increasing:
decreasing:
December 01, 2015
Homework:
p.156 #31, 35, 39, 41, 43