7. A company developed a regression line for predicting sales (S) in thousands of units per year. Time (t) is measured in years since 2005. Therefore, t = 0 corresponds to the year 2005. Given the linear regression equation S = 18? + 100 , answer the following: A) Are sales increasing or decreasing over time? By how much are they increasing or decreasing per year? B) Use the regression line to predict the sales in the year 2012. C) In what year are sales predicted to reach 460,000