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Teaching Algebra with Manipulatives

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Chapter<br />

2<br />

Linear Relations and Functions<br />

<strong>Teaching</strong> Notes and Overview<br />

<strong>Algebra</strong> Activity<br />

Recording Sheet<br />

Head versus Height<br />

(p. 218 of this booklet)<br />

Use With the activity on page 83 in Lesson 2-5<br />

of the Student Edition.<br />

Objective Find and use prediction equations.<br />

Materials<br />

tape measures<br />

Form groups of two or three students to collect<br />

the data for this activity. Have each group<br />

measure their height and the circumference<br />

of their head. Then have them record the<br />

measurements in ordered pairs (height,<br />

circumference). Next, ask them to gather the<br />

data from the other groups. Using the data,<br />

each group makes a scatter plot and completes<br />

Exercises 2 through 5. Allow time for students<br />

to share and explain their work.<br />

Answers<br />

See Teacher Wraparound Edition p. 83.<br />

Mini-Project<br />

Graphing Absolute Functions<br />

(p. 219 of this booklet)<br />

Materials<br />

acetate sheet or tracing paper<br />

2 coordinate grid transparency*<br />

* available in Overhead Manipulative Resources<br />

Answers<br />

1. shift graph of y x up 1 unit<br />

2. shift graph of y x up 2 units<br />

3. shift graph of y x down 1 unit<br />

4. shift graph of y x right 1 unit<br />

5. shift graph of y x right 2 units<br />

6. shift graph of y x right 3 units<br />

7. shift graph of y x left 1 unit<br />

8. shift graph of y x left 2 units<br />

9. shift graph of y x left 3 units<br />

10. shift graph of y x right 1 unit and up<br />

1 unit<br />

11. shift graph of y x right 3 units and up<br />

2 units<br />

12. shift graph of y x left 2 units and down<br />

3 units<br />

<strong>Algebra</strong> 2—Chapter 2<br />

Use With Lesson 2-6.<br />

Objective Graph absolute value functions.<br />

Have students work in pairs. As soon as each<br />

pair has finished tracing the graph of y x,<br />

you may want to do Exercise 1 <strong>with</strong> the class.<br />

Prior to class, prepare a transparency of the<br />

graph of y x, and also, have another<br />

coordinate grid transparency to show the graph<br />

of y x 1.Then model the same procedure<br />

as the students. Make the graph for y x 1<br />

on the transparency. Place the graph of<br />

y x 1 on the graph of y x.Ask the<br />

students to compare the two graphs. Display<br />

the answer.<br />

© Glencoe/McGraw-Hill 217 <strong>Teaching</strong> <strong>Algebra</strong> <strong>with</strong> <strong>Manipulatives</strong>

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