3. An arctic cold front is moving through an area. It is 37° when the temperature begins to drop. The scatter plot suggests a linear relationship between the temperature and the number of hours since the cold front arrived. 1 a What does the rate of change, or slope, represent in this situation? b. What is the y-intercept for the trend line and what does it represent? -1 What equation relates the change in temperature, y, to the number of hours after the cold front arrives, x? Temperature (°F) Temperature After Cold Front ty 40 35 30 25 20 15 10- 5 0 0 2 6 8 10 4 Time (hr)

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