220 Chapter 3 Graphing Linear Equations in Two Variables 29. The following table shows the average temperature in degrees Celsius for Montreal, Quebec, Canada, by month. a. Write the corresponding ordered pairs, letting correspond to the month of January. x 1 (1, 10.2), (2, 9.0), (3, 2.5), (4, 5.7), (5, 13.0), (6, 18.3), (7, 20.9), (8, 19.6), (9, 14.8), (10, 8.7), (11, 2.0), (12, 6.9). b. Plot the ordered pairs on a rectangular coordinate system. 20 18 16 14 12 10 8 4 6 0 2 4 6 30. The table shows the average temperature in degrees Fahrenheit for Fairbanks, Alaska, by month. a. Write the corresponding ordered pairs, letting correspond to the month of January. x 1 b. Plot the ordered pairs on a rectangular coordinate system. Month, x Temperature (C), y Jan. 1 10.2 Feb. 2 9.0 March 3 2.5 April 4 5.7 May 5 13.0 June 6 18.3 July 7 20.9 Aug. 8 19.6 Sept. 9 14.8 Oct. 10 8.7 Nov. 11 2.0 Dec. 12 6.9 3 10 1 2 4 5 6 7 8 9 10 11 12 Temperature (°C) Month 2 8 y x Month, x Temperature (F), y Jan. 1 12.8 Feb. 2 4.0 March 3 8.4 April 4 30.2 May 5 48.2 June 6 59.4 July 7 61.5 Aug. 8 56.7 Sept. 9 45.0 Oct. 10 25.0 Nov. 11 6.1 Dec. 12 10.1 (1, 12.8), (2, 4.0), (3, 8.4), (4, 30.2), (5, 48.2), (6, 59.4), (7, 61.5), (8, 56.7), (9, 45.0), (10, 25.0), (11, 6.1), (12, 10.1). 12 Temperature (°F) Month 70 60 50 40 30 20 10 0 10 y x 1 2 3 4 5 6 7 8 9 10 11 Expanding Your Skills 31. The data in the table give the percent of males and females who have completed 4 or more years of college education for selected years. Let x represent the number of years since 1960. Let y represent the percent of men and the percent of women that completed 4 or more years of college. Percent, y Percent, y Year x Men Women 1960 0 9.7 5.8 1970 10 13.5 8.1 1980 20 20.1 12.8 1990 30 24.4 18.4 2000 40 27.8 23.6 2005 45 28.9 26.5 2010 50 29.9 28.8 Writing Translating Expression Geometry Scientific Calculator Video
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