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Mathematics 7 Online
OpenStudy (anonymous):

The graph shows the temperature of a room, in degrees Fahrenheit, over time, in minutes. How long was the temperature decreasing? min The graph has degrees Fahrenheit on the y-axis and time in minutes on the x-axis. The graph has five sections. Section 1 is a line from point 0, 65 to point 20, 75. Section 2 is a line from point 20, 75 to point 40, 75. Section 3 is a line from point 40, 75 to point 50, 63. Section 4 is a line from point 50, 63 to point 70, 75. Section 5 is a line from point 70, 75 to point 80, 75. https://static.k12.com/calms_media/media/1522000_1522500/1522

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