The Corruption Perceptions Index uses perceptions of the general public. business people, and risk analysts to rate countries by how likely they are to accept bribes the ratings are on a scale from 0 to 10, where higher scores represent less corruption, the graph shows the corruption rating for the world's least corrupt and most corrupt countries (The ruling for the United States is' 7.6.) Use the graph to solve Exercises 99-100.
a. Write a set or four ordered pairs in which each of the least corrupt countries corresponds to a corruption rating. Each ordered pair should be in the form
(country, corruption rating).
b. Is the relation in part (a) a function? Explain your answer.
c. Write a set of four ordered pairs in which corruption ratings for the least corrupt countries correspond to countries- Each ordered pair should be in the form (corruption rating, country).
d. Is the relation in part (c) a function? Explain your answer.
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Chapter 1 Solutions
Precalculus (6th Edition)
- Broadway The ordered pairs below give the starting year and gross ticket sales S (in millions of dollars) for each Broadway season in New York City from 1997 through 2014. 1997,558 2003,771 2009,1020 1998,588 2004,769 2010,1081 1999,603 2005,862 2011,1139 2000,666 2006,939 2012,1139 2001,643 2007,938 2013,1269 2002,721 2008,943 2014,1365 (a) Use a graphing utility to create a scatter plot of the data. Let t=7 represent 1997. (b) Use the regression feature of the graphing utility to find the equation of the least squares regression line that fits the data. (c) Use the graphing utility to graph the scatter plot you created in part (a) and the model you found in part (b) in the same viewing window. How closely does the model represent the data? (d) Use the model to predict the gross ticket sales during the season starting in 2021. (e) Interpret the meaning of the slope of the linear model in the context of the problem.arrow_forwardPractice Solve each problem. Teacher certification On the Illinois certification test for teachers specializing in learning disabilities, a teacher earned the scores shown in the accompanying table. What was the teachers score in program development? Human development with special needs 82 Assessment 90 Program development and instruction ? Professional knowledge and legal issues 78 AVERAGE SCORE 86arrow_forward
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