Wren recorded an outside temperature of negative 2 degrees F at 8 a.m. When she checked the temperature again, it was 4 degrees F at 12:00 p.m. If x represents the time and y represents the temperature in degrees Fahrenheit, what is the slope of the line through these two data points?

The two points are (8, −2) and (12, 4), where time is measured in hours. The slope is the change in temperature divided by the change in time: (4 − (−2)) ÷ (12 − 8) = 6 ÷ 4 = 1.5. Therefore, the slope is 1.5 degrees Fahrenheit per hour, choice A.

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