Warmup

1.) 4x2 = 20 2.) 3x2 + 2 = 29

3.) 4.)

5.) 6.)

155 60

5

10

25

3

After Quiz: 1.

X Y Work

382 2 xxy

CHAPTER 9SECTION 4

Graphing Quadratic Functions

Solving by Graphing

The solution is where the graph crosses the x- axis x- intercepts- where y = 0

Steps: Set the equation = 0 Graph the function Find the x-intercepts

Can have 0, 1, or 2 answers Pg 529 # 18-20 together

Example 1. 62 xx

X Y Work

Example: 2. 462 2 xx

X Y Work

Example: 3. 542 x

X Y Work

Example

4.) 01072 xx

X Y Work

Example

5.)

X Y Work

62 xx

Example

6.)

X Y Work

322 xx

Homework

Page 530# 35-37 Review Packet