Using the exponential smoothing model for forecasting. the smoothing constant alpha determines the level of smoothing and Multiple Choice. the speed of reoction to differences between forecosts and octuol results: the intercept on the Y-ovis the next forecast errot s measure orforecast occurocy the speed of reaction to differences between forecasts and actual results. the intercept on the Y-axis. the next forecost error. o meosure of forecost occuracy the slope of the growth curve