Using the Least Squares Regression Method results above, predict the Etching Costs for next period if the units How certain you are that the Etching Costs would be close to the amount predicted? Compare the results of the High-Low and Regression Methods and determine which, if any, is more accurate. what is the metric that can describe how well the regression data fit the data? To which methodology/model does this apply (high-low or regression)? What does ? measure? How is r measured