Communicating

With Diagrams

1-1

You see these signs along the road. What do they mean?

No right turns

Hill

No EntryRailroad crossing

Yield

PedestriansSlippery when wet

You see these signs in an airport.

What do you think they mean?

Boarding Area

Restrooms

Baggage Area

Arriving

Food/Restaurant

Emergency phone/Security

a. What are two things you can learn from the table? Graph?

b. Invent a question that is more easily answered from the table than the graph? Explain how to find the answer.

c. Invent a question that is more easily answered from the graph than the table? Explain how to find the answer

1. What ideas do you think the person who made this concept map has learned?

2. List some ideas you might put I a concept map about road signs?

Hom

ew

ork

Pg 6 (9-16,17-22, 31-34)

BELLWORK

•What are some symbols without words that are understood internationally? Sketch two examples.

VARIABLE EXPRESSIONS

• A variable:• is a letter used to represent one or more

numbers.• In the table, d represents the number of days the

kudzu grows• Variable expression: • 12d represents the length of the kudzu vine after

d days

SAMPLE 1

• Peter earns $12 an hour. Write a variable expression for the amount he hears in h hours.

Talk it over• How are the variable expressions for the length of

kudzu and the amount of money Peter earns alike How are they different? • Describe a situation that could be represented by

the expression 4x. Be sure to tell what x represents.

SAMPLE 2

• A row of triangles is built with toothpicks. Write a variable expression for the perimeter of Shape n.

1

1

11

1

1

1

1

1

1 1

1

Shape 1 Shape 2 Shape 3

+Bellwork

What does the 2 represent in the number below?

What does the 5 represent?

What is another way to represent the same number?

25

Understa

ndin

g E

xponents

Base

Exponent

= 32

“two to the fifth power”

2 x 2 x 2 x 2 x 2 = Factors

+Flour Power Pg 1

9

+Sample 1

Write the product as a power. Then write how to say it.A. 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 B. 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2

+Sample 2 Write an expression for the area covered by the tiles.

Evaluate your expression for each value of x.

a. x = 5 b. x = 10

+Homework

Pg 23 (4, 5, 12, 15, 21, 24, 25)

Geometry Skills Test- Today at lunch ONLY