Post on 19-Jan-2018
description
Chapter 10
Section 2
Review
• Quadratic Functiony = ax2 + bx + c y = 2x2
+ 3x + 1
• Symmetry
Axis of Symmetry
Quadratic Formula: ax2 + bx + c
What is axis of symmetry?
Formula for x valueOf symmetry axis: -b / 2a
This is also the x-coordinate of the vertex!
Find the Axis of Symmetry(use -b / 2a )
y = 2x2 + 2x
y = -3x2 + 6x + 5
Find the Coordinates of the Vertex(need to find x and y)
y = 2x2 + 4x
y = 3x2 – 9x + 5
Match the Graph
A. y = x2 – 6x
Graphing y = ax2 + bx + c
1. Find the axis of symmetry and coordinates of the vertex
2. Find 2 more points (you can use y intercept)
3. Graph and reflect points
Practice
y = -3x2 + 6x + 5
1. Find the axis of symmetry and coord of the vertex
2. Find 2 more points (you can use y intercept)
3. Graph and reflect points
Practice
y = x2 – 2x – 3
Practice
f (x) = x2 – 4x + 3
Assignment
• P. 520 #1-16• SimSo 44