Over Lesson 2–5

A. A

B. B

C. C

D. D

Find .

A. –9

B.

C.

D. 9

In a series of plays in a football game, a running back had the following yards per play: –5, –3, +2, +1, and –2. Find the mean running yardage for that series.

A. –1.4 yd

B. –0.2 yd

C. 0.6 yd

D. –0.6 yd

You have already used ordered pairs to name and locate points. (Lesson 1–4)

• Graph points on a coordinate plane.

• Graph algebraic relationships.

• quadrants

Y-axis

X-axis

Quadrant I (+,+)

Quadrant II(-,+)

Quadrant III(-,-)

Quadrant IV(+,-) Origin (0,0)

Recall…we discussed the 4 Quadrants earlier in the year. Today, we will work with all 4 Quadrants.

Write Ordered Pairs

A. Write the ordered pair that names point P.

The x-coordinate is 4.

The y-coordinate is –2.

Answer: The ordered pair is (4, –2).

Write Ordered Pairs

B. Write the ordered pair that names point Q.

The x-coordinate is –3.

The y-coordinate is –1.

Answer: The ordered pair is (–3, –1).

A. A

B. B

C. C

D. D

A. (2, 3)

B. (–3, –2)

C. (–2, –3)

D. (–3, 2)

A. Write the ordered pair that names point M.

A. A

B. B

C. C

D. D

A. (4, –1)

B. (4, 1)

C. (1, –4)

D. (–1, 4)

B. Write the ordered pair that names point N.

Graph Points and Name the Quadrant

A. Graph and label S(–1, –5) on a coordinate plane. Name the quadrant in which the point lies.

Start at the origin.

Answer: Point S is in Quadrant III.

Move 1 unit left.

Then move 5 units down and draw a dot.

B. Graph and label U(–2, 3) on a coordinate plane. Name the quadrant in which the point lies.

Answer: Point U is in Quadrant II.

Start at the origin.

Move 2 units left.

Then move 3 units up and draw a dot.

Graph Points and Name the Quadrant

A. A

B. B

C. C

D. D

A. Quadrant I

B. Quadrant II

C. Quadrant III

D. Quadrant IV

A. Graph and label A(3, –4) on a coordinate plane. Name the quadrant in which the point lies.

A. A

B. B

C. C

D. D

A. Quadrant I

B. Quadrant II

C. Quadrant III

D. Quadrant IV

B. Graph and label B(–2, 1) on a coordinate plane. Name the quadrant in which the point lies.

Graph an Algebraic Relationship

GAMES Mrs. Gossell’s class is playing a classroom quiz game. The difference between Ali’s and Joachim’s scores is 3 points. If x represents Ali’s score and y represents Joachim’s score, make a table of possible values for x and y. Then graph the ordered pairs and describe the graph.

First, make a table. Choose values for x and y that have a difference of 3.

Then graph the ordered pairs on a coordinate plane.

Graph an Algebraic Relationship

Answer: The points in the graph are on a line that slants upward to the right. The line crosses the y-axis at y = –3.

Graph an Algebraic Relationship

A. A

B. B

C. C

D. D

A. The sum of two integers is 3. If x represents the first integer and y represents the second integer, make a table of possible values for x and y.

A. B.

C. D.