Lesson 2.3 - Plotting Integers On The Coordinate Plane

Five-Minute Check (over Lesson 2–2) Main Idea and Vocabulary Key Concept: Coordinate Plane Example 1:Naming Points Using Ordered Pairs Example 2:Graph an Ordered Pair Example 3:Locate an Ordered Pair Example 4:Identify Quadrants

• Graph points on a coordinate plane.

• coordinate plane

• ordered pair

• x-axis

• x-coordinate

• y-axis

• y-coordinate

• origin • quadrant

Naming Points Using Ordered Pairs Write the ordered pair that names point R. Then state the quadrant in which the point is located. Start at the origin. Move left on the x-axis to find the x-coordinate of point R, which is –2. Move up to find the y-coordinate, which is 4. Answer: So, the ordered pair for point R is (–2, 4). Point R is located in Quadrant II.

Write the ordered pair that names point M. Then name the quadrant in which the point is located.

1. 2. 3. 4.

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Graph an Ordered Pair Graph and label point M(3, 5). Start at the origin. The x-coordinate is 3. So, move 3 units to the right. Next, since the y-coordinate is 5, move 5 units up. Draw a dot and label it M(3, 5).

Answer:

Graph and label the point G(–2, –4).

1. 2. 3. 4.

A B C D

Locate an Ordered Pair GEOGRAPHY Use the map of Utah shown below. In which quadrant is Vernal located? Vernal is located in the upper right quadrant, Quadrant I.

Answer: Quadrant I

GEOGRAPHY Use the map of Utah. In which quadrant is Tremonton located? A. Quadrant I B. Quadrant II 1. 2. 3. 4.

C. Quadrant III 0% D

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D. Quadrant IV

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Identify Quadrants Which of the cities labeled on the map is located in Quadrant IV? Quadrant IV is the lower right quadrant. So, Bluff is in Quadrant IV.

Answer: Bluff

Name a city from the map of Utah that is located in Quadrant III. A. Tremonton B. Vernal 1. 2. 3. 4.

C. Bluff

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D. Cedar City

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End of the Lesson

Homework – Pg. 91, # 11-38 all

Five-Minute Check (over Lesson 2–2) Image Bank Math Tools

Adding Integers Comparing and Ordering Integers Subtracting Positive and Negative Integers

(over Lesson 2-2)

Use < or > to make a true sentence. –21 __ –15 A. <

A

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(over Lesson 2-2)

Use < or > to make a true sentence. 5 __ –5 B. >

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(over Lesson 2-2)

Use < or > to make a true sentence. 0 __ –1 A. < B. >

A

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(over Lesson 2-2)

Order 7, –1, 0, 4, –6 from least to greatest. A. 7, 4, 0, –1, –6 B. –1, –6, 0, 4, 7

A B C 0% D

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D. –6, –1, 0, 4, 7

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C. 0, –1, 4, –6, 7

(over Lesson 2-2)

If 0 is the second smallest number in a set of 10 integers, what can you conclude about the other 9 numbers?

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You can tell that 8 numbers in the set are greater than 0, and 1 number is less than 0. You can tell that 8 numbers in the set are greater than 0, and 2 numbers are less than 0. You can tell that 8 numbers in the set are less than 0, and 1 number is greater than 0. You can tell that 8 numbers in the set are less than 0, and 2 numbers are greater than 0.

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A.

(over Lesson 2-2)

Which of the following is a true sentence? A. 0 < –7 B. –3 > 6 A B C 0% D

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D. 1 < –4

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C. –2 > –5