202 Chapter 3 Linear Equations in Two Variables i. Write an ordered pair for the points on the graph. ii. What year had the greatest average ad cost? What was it? iii. In what year(s) was the average cost of an ad $2.4 million? Solution 5c. i. The ordered pairs on the graph correspond to the points (2002, 2.2), (2003, 2.2), (2004, 2.3), (2005, 2.4), (2006, 2.5), (2007, 2.4), (2008, 2.7), (2009, 3), and (2010, 2.6). ii. The average cost of a Super Bowl ad was greatest in the year 2009. The cost was $3 million. iii. The average cost of an ad was $2.4 million in the years 2005 and 2007. Student Check 5 Use the table or graph to answer each question. a. The table provides information on the number of murder victims by juvenile gang killings for the given year. (Source: http://www.fbi.gov/ucr) Years After 2000 0 1 2 3 4 Number of Victims 653 862 911 819 804 i. Write an ordered pair for each year, where x is the number of years after 2000 and y is the number of victims. ii. Interpret the first and last ordered pairs. iii. Plot the ordered pairs to form a scatter plot of the data. b. The bar graph shows the number of unique visitors, in millions, for the given websites for August 2010. (Source: http://www.compete.com) Unique Visitors, in Millions, August 2010 amazon.com 71 barnesandnoble.com 8 bestbuy.com 17 ebay.com 65 gap.com 6 homedepot.com 12 jcpenney.com 14 macys.com 9 sears.com 13 staples.com 8 target.com 28 walmart.com 35 zappos.com 6 10 0 20 30 40 50 60 70 80 i. Write ordered pairs for the bar graph, where x is the website and y is the number of unique visitors, in millions. ii. Which website had the largest number of visitors in August 2010? How many did it have? iii. Which website had the least number of visitors in August 2010? How many did it have? Troubleshooting Common Errors Some common errors associated with solutions of equations and the rectangular coordinate system are shown next. Objective 6 ▶ Troubleshoot common errors.
hendricks_beginning_algebra_1e_ch1_3
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