Use the following data to forecast the 2019 demand. A - Make the graphic method. B - Determine the intercept in y. C - Determine the slope. D - Determine the line equation. E - What is the 2019 prognosis by the graphic method. F - Determine the line equation with the square minimum method (Least Squared Method. ). G - Determine the correlation and specify whether the equation is useful or not to forecast. H - Calculate the coefficient of determination and which means the value found. Year demand (Units 2012 10 2013 14 2014 12 2015 16 2016 15 2017 20 2018 18