Below we give the average hourly outdoor temperature (x) in a city during a week and the city's natural gas consumption (y) during the week for each of eight weeks (the temperature readings are expressed in degrees Fahrenheit and the natural gas consumptions are expressed in millions of cubic feet of natural gas-denoted MMcf). The output to the right of the data is obtained when MINITAB is used to fit a least squares line to the natural gas consumption data.

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Average Hourly Temperature x (oF) 28.0 28.0 32.5 39.0 45.9 Weekly Natural Gas Consumption, y (MMcf) Best Fit Line for Gas Consumption Data Gascons = 15.84-0.1279 Temp Week 12.4 11.7 12.4 10.8 9.4 9.5 8.0 7.5 13 12 2 11 O 10 4 58.1 62.5 8 7 30 40 50 60 Temp