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. the table presents the data:
percent gain
1.0 .02
2.0 .03
2.5 .035
3.0 .042
3.5 .05
4.0 .054
a. plot a scatter diagram.
b. fit a linear solution.
c. predict the weight gain when the metal is exposed for 3.2 hours.