Identifying Quadratic Functions

L e s s o n Q u i z T R a n s pa r e n cy

Quadratic 9-1 Identifying Functions Lesson Quiz 1. Is y ⫽ ⫺x ⫺ 1 quadratic? Explain. 2. Graph y ⫽ 1.5x 2.

Use this graph for Problems 3–5. Þ ä

Ý Î

Ç

{

n

3. Identify the vertex. 4. Does the function have a minimum or maximum? What is it? 5. Find the domain and range.

Copyright © by Holt McDougal. All rights reserved.

154

Holt McDougal Algebra 1

L e s s o n Q u i z T R a n s pa r e n cy

Quadratic 9-1 Identifying Functions Lesson Quiz 1. Is y ⫽ ⫺x ⫺ 1 quadratic? 2 Explain. No; there is no x -term, so a  0. 2. Graph y ⫽ 1.5x 2. 6

y

x 0

-3

3

Use this graph for Problems 3–5. Þ ä

Ý Î

Ç

{

n

3. Identify the vertex.  5, 4  4. Does the function have a minimum or maximum? What is it? max; 4 5. Find the domain and range. D: all real numbers; R: y  4

Copyright © by Holt McDougal. All rights reserved.

154

Holt McDougal Algebra 1