15-65 The Zapit Company has recorded the following numbers (in hundreds of thousands) of total sales of its line of microwave ovens over the last 5 years: Year 1991 1992 1993 1994 1995 Sales 3.5 3.8 4.0 3.7 3.9 The equation describing the trend for these sales volumes is Y = 3.78 + 0.07x, where 1993 =0, and x units = 1 year (a) Which year had the largest percent of trend? (b) Which year was closest to the trend line