1. 2-1 Introduction to IntegersIntroduction to Integers 2-2 Adding IntegersAdding Integers 2-3 Subtracting IntegersSubtracting Integers 2-4 Multiplying and Dividing IntegersMultiplying and Dividing Integers 2-5 Solving Equations Containing IntegersSolving Equations Containing Integers 2-6 The Coordinate PlaneThe Coordinate Plane 2-7 Equations in Two VariablesEquations in Two Variables 2-8 Graphing EquationsGraphing EquationsPreview Lesson Quizzes

2. Lesson Quiz: Part I Compare. Use, or =. 1. –32 32 2. 26 |–26| 3. –8 –12 4. Use a number line to order the integers –2, 3, –4, 5, and –1 from least to greatest. –4, –2, –1, 3, 5 1 2 3 4 5 –5–4 –3 –2–1 0 = < > 2-1 Introduction to Integers

3. Lesson Quiz: Part II Use a number line to find the absolute value. 5. |–3| 3 1 2 3 4 5 –5 –4 –3 –2 –1 0 3 units 2-1 Introduction to Integers

4. Lesson Quiz: Part I Use a number line to find the sum. 1. –7 + (–6) Find each sum. 2. –15 + 24 + (–9) 3. –24 + 7 + (–3) 4. Evaluate x + y for x = –2 and y = –15. 0 –13 –20 –17 2 –14 –12 –10 –8 –6 –4 –2 0 2-2 Adding Integers

5. Lesson Quiz: Part II 5. The math club’s income from a bake sale was $217. Advertising expenses were $32. Use integer addition to find the club’s total profit or loss? $185 profit 2-2 Adding Integers

6. Lesson Quiz Use a number line to find the difference. 1. 3 – 9 Find each difference. 2. –7 – 43. –3 – (–5) 4. Evaluate x – y + z for x = –4, y = 5, and z = –10. –11 –6 2 –19 5. On January 1, 2002, the high temperature was 81F in Kona, Hawaii. The low temperature was –29F in Barrow, Alaska. What was the difference between the two temperatures? 110F 2-3 Subtracting Integers

7. Lesson Quiz Use a number line to find the product. 1. –8  2 Find each product or quotient. 2. –3  5  (–2)3. –75 ÷ 54. –110 ÷ (–2) –16 –155530 5. The temperature in Bar Harbor, Maine, was –3°F. It then dropped 3 degrees per hour over the next 3 hours. What was the temperature then? –12°F 2-4 Multiplying and Dividing Integers

8. Lesson Quiz Solve each equation. Check your answer. 1. –8y = –800 2. x – 22 = –18 3. – = 7 4. w + 72 = –21 5. Last year a phone company had a loss of $25 million. This year the loss is $14 million more last year. What is this year’s loss? 4 100 –49 –93 y7y7 $39 million 2-5 Solving Equations Containing Integers

9. Lesson Quiz 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. A6. B 7. C8. D III IV I II (–2, 3) (1, 2) (0, –2) (–2, –3) 2-6 The Coordinate Plane

10. Lesson Quiz 1. Write an equation in two variables that gives the values in the table below. Use your equation to find the value for y for the indicated value of x. 2. Write an equation for the relationship. Tell what each variable you use represents. The height of a round can is 2 times its radius. h = 2r, where h is the height and r is the radius y = 3x; 21 x01357 y03915 2-7 Equations in Two Variables

11. Lesson Quiz 1. Use the given x-values to write solutions as ordered pairs to the equation y = –3x + 1 for x = 0, 1, 2, and 3. 2. Determine whether (4, –2) is a solution to the equation y = –5x + 3. 3. Graph the function described by the equation y = –x + 3. No, –2 ≠ –5(4) + 3 (0, 1), (1, –2), (2, –5), (3, –8) 2-8 Graphing Equations