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013_024_CC_A_AMC2_C01_662328.indd Page 21 3/6/12 7:47 AM 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 3A SCORE _________ 1. Which size bag of cat food shown in the table has the lowest unit price? Size (oz) 24 40 64 Cost ($) 5.49 8.00 15.99 2. The graph shows the savings of Mia and Kyle. What does the slope of each line represent? 1. 40 oz the rate of which money 2. was saved Monthly Savings Dollars($) 80 60 Kyle 40 Mia 20 0 1 2 3 Month 3 3. Cyclists were − finished with their ride when they reached 5 the 15-kilometer mark. How long was their ride? 3. 25 km 6 bottles 1.5 bottles −−−−− $4 $1 18 bottles 1.8 bottles and −−−−− = −−−−− ; $10 $1 Copyright © The McGraw-Hill Companies, Inc. Permission is granted to reproduce for classroom use. No; −−−− = 4. A grocery store sells 6 bottles of water for $4 and 18 bottles of water for $10. Is the cost of the water proportional to the number sold? Explain. these rates are not equivalent. 4. Solve each proportion. k 0.6 5. −− = −− 5. 15.6 18.2 4 = −− 6. −−− 16 6. 72.8 6.5 3 7. −− = −−− 7. 25.35 8. When diving, a hummingbird can reach a speed of 40 miles per hour. What is this speed in feet per second? Round to the nearest hundredth if necessary. 8. 58.67 ft/s 13 j v 0.5 11.7 21 Course 2 • Chapter 1 Ratios and Proportional Reasoning P rinter P DF 013_024_CC_A_AMC2_C01_662328.indd Page 22 3/6/12 7:47 AM s-019 /Volumes/102/GO00864_AM_R1/MIDDLE_SCHOOL_MATH/NATIONAL/ANCILLARY.. /Volumes/102/GO00864_AM_R1/MIDDLE_SCHOOL_MATH/NATIONAL/ANCILLARY... NAME _____________________________________________ DATE __________________ PERIOD _________ Test, Form 3A SCORE _________ (continued) 1 2− o per hour 9. 2 9. Find the rate of change from the table. Time (hr) 2 4 6 Temperature (°) 75 80 85 Yes, the graph shows a straight line that passes through the origin. 10. 10. Does the graph show a proportional relationship? Explain. Cost ($) Candy 9 8 7 6 5 4 3 2 1 0 1 2 3 4 Candy (lb) 11. 7 days 12. Janelle can get a 24-pack of bottled water for $6.80. How much would Janelle have to pay for a 12-pack of bottled water if the ratios are proportional? 12. $3.40 13. Find y when x = 9 if y varies directly as the square of x, and y = 245 when x = 7. 13. 405 14. Jaime and Ryan work at the grocery store. The wages earned for the weekend are shown in the table and graph. Who gets paid more per hour? Explain. Jaime; since the slope of the line is 7 and the table shows a rate of $8 per hour, Jaime makes 14. more. Ryan’s Wages 20 Wages($) Jaime’s Wages Time (h) Wages ($) 3 24 4 32 5 40 15 10 5 0 1 2 3 Time(h) 22 Course 2 • Chapter 1 Ratios and Proportional Reasoning P rinter P DF Copyright © The McGraw-Hill Companies, Inc. Permission is granted to reproduce for classroom use. 11. If it takes the Ramirez family 3 days to travel 1,560 miles, how many days will it take them to travel 3,640 miles?