19. Person Birthday 20. Father Daughter Elvis Jan. 8 Bob Beth Colleen Diane Kaleigh Mar. 15 John Linda Marissa Sept. 17 Chuck Marcia 21. Hours Worked Salary 22. Level of Education Average Income 20 Hours $200 Less than 9th grade $18,120 $300 9th-12th grade $23,251 30 Hours $350 High School Graduate $36,055 40 Hours $425 Some College $45,810 College Graduate $67,165 23. {(2, 6), (–3, 6), (4, 9), (2, 10)} 24. {(-2,5), (-1, 3), (3,7), (4, 12)} 25. {(1,3), (2, 3), (3, 3), (4, 3)} 26. {(0, –2), (1, 3), (2, 3), (3,7)} 27. {(-2, 4), (-2, 6), (0,3), (3, 7)} 28. {(-4,4), (–3, 3), (–2, 2), (–1,1), (-4, 0)} 29. {(-2, 4), (–1, 1), (0,0), (1, 1)} 30. {(-2, 16), (-1,4), (0, 3), (1, 4)}

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