A chemist is interested in determining the weight loss y of a particular compound as a function of the amount of time the compound is exposed to the air. The data in the following table give the weight losses associated with n = 12 settings of the independent variable, exposure time.

Weight Loss and Exposure Time Data Weight Loss, y Exposure Time Weight Loss, y Exposure Time (in pounds) (in hours) (in pounds) (in hours) 4.3 6.6 5.5 7.5 6.8 2.0 YOUANO 8.0 4.0 4.0 5.7 5.2 6.5