3. The corrosion of a certain metallic substance has been studied in dry oxygen at 500 degrees Centigrade. In this experiment, the gain in weight after various periods of exposure was used as a measure of the amount of oxygen that had reacted with the sample. Here are the data:

(a) Plot a scatter diagram.

(b) Fit a linear relation.

(c) Predict the percent weight gain when the metal is exposed for 3.2 hours.

Transcribed Image Text:

Hours Percent Gain 1.0 .02 2.0 .03 2.5 .035 3.0 .042 3.5 .05 4.0 .054