Do Now“Top 5 Dog-Owning Countries” (TFK 12/19/14)

“It's a dog's world! There are nearly 180 million canine companions in homes around the globe. These countries are the leading dog-owners. Woof, woof!”Write in standard form1 U.S.A. 72.638 million dogs2 Brazil 37.3094 million dogs3 China 27.672 million dogs4 Mexico 26.4435 million dogs5 Russia 15.894 million dogs6 Find the difference between Mexico & Russia7 Find the total of U.S.A. & China

1/20/2015 7-1 A Coordinate Plane

Battleship Activity

What letter is located at (4,2)?

A B C D E

F G H I J

K

P

L M N O

Q R S T

4

3

2

11 2 3 4 5

coordinate plane -formed by two number lines in a plane that intersect at right angles

The two number lines are called the axes.

• The horizontal axis is called the x-axis.

• The vertical axis is called the y-axis.

• The two axes divide the coordinate plane into four quadrants.

• The point where the axes intersect is called the origin.

Example 1

Name the quadrant where each point is located.

A. X

B. Y

C. S

Quadrant IV

Quadrant III

Quadrant II

The numbers in an ordered pair are called coordinates.

-The first number is called the x-coordinate.

The second number is called the y-coordinate.

The ordered pair for the origin is (0,0).

Example 2

Give the coordinates of each point.

X

(4, –1)

Example 3

Give the coordinates of each point.

Y

(–2, –3)

From the origin, Y is 2 units left, and 3 units down.

Example 4

Give the coordinates of each point.

S

From the origin, S is 3 units left, and 3 units up.

(–3, 3)

Example 5

Graph each point on a coordinate plane.

A. V(4, 2)

B. W(–3, 1) x

y

–4 –2 0 2 4

4

2

–2

–4

From the origin, move 4 units right, and 2 units up.

VW

From the origin, move 3 units left, and 1 unit up.

Example 6

Graph each point on a coordinate plane.

C. Z(0, 4)

D. T(1, –3)

From the origin, move 4 units down.

x

y

–4 –2 0 2 4

4

2

–2

–4 Z

TFrom the origin, move 1 unit right, and 3 units down.

Ex. 7:What is the ordered pair for A?

1. (3, 1)2. (1, 3)3. (-3, 1)4. (3, -1)

5

5

-5

-5

• A

Ex. 8: What is the ordered pair for B?

5

5

-5

-5

• B

1. (3, 2)2. (-2, 3)3. (-3, -2)4. (3, -2)

Ex. 9: What is the ordered pair for C?

1. (0, -4)2. (-4, 0)3. (0, 4)4. (4, 0)

5

5

-5

-5

• C

Ex. 10: What is the ordered pair for D?

5

5

-5

-5

• D

1. (-1, -6)2. (-6, -1)3. (-6, 1)4. (6, -1)

Ex.11: Name the quadrant in which each point is located(-5, 4)

1. I2. II3. III4. IV5. None – x-axis6. None – y-axis

Ex. 12: Name the quadrant in which each point is located(-2, -7)

1. I2. II3. III4. IV5. None – x-axis6. None – y-axis

Ex. 13: Name the quadrant in which each point is located(0, 3)

1. I2. II3. III4. IV5. None – x-axis6. None – y-axis

Name the quadrant where each ordered pair is located.

1. (3, –5) 2. (–4, –2)

3. (6, 2) 4. (–7, 9)

Give the coordinates of each point.

5. A 6. B

7. C 8. D

IIIIV

I II

(–2, 3) (1, 2)

(0, –2) (–2, –3)

Exit Ticket

Homework

• Pg. 369 #1-22 Evens• Plot 5 Points on Graph Paper and write the

ordered pairs in your notebook