Introduction to regression

Regression analysis is a basic method used in the statistical analysis of data. It's a statistical method that helps to find the relationships between variables. It is basically used for understanding the relationship between input and output numerical variables. We should first identify the dependent variable, which will vary based on the value of the independent variable. For example, the value of the house (dependent variable) varies based on the square footage of the house (independent variable). Regression analysis is very useful for prediction.

In a simple regression problem (a single x and a single y), the form of the model would be as follows:

y = A + B*x

In higher dimensions, when we have more than one input (x), the line is called a plane or a hyperplane. 

In our example, we predict the price of the house based on the various...