Test Form 2B Answer Key

181_192_CC_A_AMC1_C08_662327.indd Page 187 3/14/12 8:40 PM s-019 /Volumes/102/GO00864_AM_R1/MIDDLE_SCHOOL_MATH/NATIONAL/ANCILLARY.. /Volumes/102/GO00864_AM_R1/MIDDLE_SCHOOL_MATH/NATIONAL/ANCILLARY... NAME _____________________________________________ DATE __________________ PERIOD _________ Test, Form 2B Write the letter for the correct answer in the blank at the right of each question. 1. Which of the following sets of values completes the function table? 2x + 6 2(3) + 6 2(9) + 6 2(17) + 6 Input (x) 3 9 17 A. 6, 18, 34 B. 12, 24, 40 Output (y) C. 12, 18, 26 D. 0, 12, 28 1. B 2. G 3. C 4. H 5. D 2. What is the rule to find the value of the missing term in the table? F. n + 1 G. n + 4 1 5 2 6 3 7 4 8 H. 5n 3. The graph shows the total cost of a zoo membership for a family. Which equation can be used to find the total cost y for any number of family members x? A. y = 10x C. y = 10x + 25 B. y = 25x D. y = 25x + 10 y F. r ≤ 13 12 13 14 40 30 20 0 4. Which inequality is graphed below? 11 n I. 4n + 1 Total Cost ($) Position Value of Term x 1 2 3 4 5 6 Number of People 15 G. r < 13 H. r ≥ 13 I. r > 13 5. Which of the following is a solution of the inequality 3x ≥ 15? A. 0 B. 2 C. 4 D. 6 6. Which of the following inequalities has the solution shown below? 0 F. 4n ≥ 20 1 2 G. 4n ≤ 20 3 4 5 6 H. 4n > 20 7 8 I. 4n < 20 6. I Solve each inequality. 7. x - 3 ≤ 7 A. x ≤ 4 B. x ≥ 4 C. x ≥ 10 D. x ≤ 10 7. D 8. 3b < 18 F. b < 6 G. b > 6 H. b > 54 I. b < 54 8. F B. y < 3 C. y > 27 D. y < 27 9. C y 9. −− >9 3 A. y > 3 187 Course 1 • Chapter 8 Functions and Inequalities P rinter P DF 181_192_CC_A_AMC1_C08_662327.indd Page 188 3/17/12 3:43 PM s-019 /Volumes/102/GO00864_AM_R1/MIDDLE_SCHOOL_MATH/NATIONAL/ANCILLARY.. /Volumes/102/GO00864_AM_R1/MIDDLE_SCHOOL_MATH/NATIONAL/ANCILLARY... NAME _____________________________________________ DATE __________________ PERIOD _________ Test, Form 2B (continued) For Exercises 10 –12, find the rule for each function table. 10. Input Output (x) (y) 1 4 2 8 4 16 11. Input Output (x) (y) 0 0 3 1 9 3 12. Input Output (x) (y) 3 1 5 3 8 6 10. 4x 11. x÷3 12. x-2 Use the table below for Exercises 13 and 14. 1 8 Position Value of Term 2 16 3 24 4 32 n multiply the position number by 8; 8n 13. Use words and symbols to describe the value of each term as a function of its position. 13. 14. Find the value of the fifteenth term in the sequence. 14. 15. A gym charges a $35 registration fee plus an additional $20 for each month that you attend. Write an equation that could be used to find the total cost y for someone to attend the gym for any number of months x. Then graph the equation. 15. y = 20x + 35 120 y Cost ($) 90 70 50 16. Lauretta is buying DVDs that cost $9 each. She has a coupon for $6 off her total purchase. Write an equation to find c the total amount she will spend on any number of DVDs d. Then use the equation to find the amount she will spend if she buys 8 DVDs. 30 x 0 1 2 3 4 5 6 7 8 9 Months 16. c = 9d - 6; $66 Write an equation to represent the function. 17. Input, x Output, y 1 3 2 6 3 9 4 12 18. Input, x Output, y 1 2 2 6 y = 3x 17. 3 4 10 14 18. y = 4x - 2 19. Is 11, 12, or 13 a solution of the inequality 3x < 36? 19. 11 20. Write an inequality to represent the statement Hugo can spend no more than $10 on lunch. Then graph the inequality on a number line. 20. h ≤ 10 8 9 10 11 12 Solve each inequality. Graph the solution on a number line. 14 x 22. −− <2 15 16 22 23 17 18 x < 24 22. 12 188 x ≥ 16 21. 21. x - 4 ≥ 12 24 25 26 Course 1 • Chapter 8 Functions and Inequalities P rinter P DF