Adopt the sliding average value method, curve model method in the analytic approach of the array of time, the secular trend of the sales amount of FTM company through calculating annual rate of increase is determined.

• 采用时间序列分析法中的滑动平均值法、曲线模型法,通过计算年增长率来进行FTM公司销售额的长期趋势测定。