Day 6: Regression
With regression, you can make predictions.
When there is a strong correlation between two variables (positive or negative), you can make accurate predictions from one to the other. If sales and time are highly correlated, you can predict what sales will be in the future…or in the past. You can enhance the sharpness of an image by predicting what greater detail would look like (filling in the spaces between the dots with predicted values). Of course the accuracy of your predictions, depends on the strength of the correlation. Weak correlations produce lousy predictions.