When you use regression to predict future values of the dependent variable, the ideal correlation between the independent and dependent variable is high—in absolute value terms, somewhere in the range between .5 to .99. Viewing the scatter plot above, you can see that there appears to be some degree of correlation between the level of advertising expenditure and product awareness. When calculated, this correlation equals .89. This historical data will enable you to predict the relationship between the two variables in the future, before any further expense is incurred. In order to make these predictions, a regression line must be drawn from the information appearing in the scatter plot