An economic policy research organization has asked you to study the relationship between disposable income and unemployment level. The data for this study are contained in the data file Economic Activity. As a first step you estimate the regression model for the relationship between unemployment regressed on disposable income. Determine if there is a significant relationship between unemployment and disposable income and whether the relationship is increasing or decreasing. Compute the 95% prediction interval for unemployment when disposable income is $30,000.