1. Graphing Quadratic Functions
Lesson 5-1 Part 1

2. MAIN IDEAS Graph Quadratic Functions by creating a table of values
Determine y-intercept, axis of symmetry, and Vertex for a Quadratic Function

3. Graph a Quadratic Function by Making a Table of Valuesx
x2 + 3x – 1
f(x)
(x,y) -3
(-3)2 + 3(-3) – 1
f(-3) = -1
(-3,-1) -2
(-2)2 + 3(-2) – 1
f(-2) = -3
(-2,-3) -1
(-1)2 + 3(-1) – 1
f(-1) = -3
(-1,-3)
(0)2 + 3(0) – 1
f(0) = -1
(0,-1) 1
(1)2 + 3(1) – 1
f(-3) = 3
(1,3)
1. Set up your columns including x-term, function, f(x), and (x,y)
2. Choose integer values for x
3. Evaluate the function for each value of x
4. Graph points on coordinate graph

5. You try! Graph f(x) = x2 – 4x – 8 by making a table of values. x
(x,y)
Graph f(x) = x2 – 4x – 8 by making a table of values.

6. Solution for f(x) = x2 – 4x – 8
(x,y) -2
(-2)2 – 4(-2) – 8 4
(-2,4)
(0)2 – 4(0) – 8 -8
(0,-8) 2
(2)2 – 4(2) – 8
-12
(2,-12)
(4)2 – 4(4) – 8
(4,-8) 6
(6)2 – 4(6) – 8
(6,4)