#### Multiple regression

Multiple linear regression model
A multiple linear regression model represents a statistical model that relates
one outcome variable called dependent variable to two or more variables called
independent variables. In the multiple linear regression model it is assumed
that the independent variables "cause" or "explain" the dependent variable.

Examples 1. The management believes
that the number of units sold can be explain (at least in part) by the number
of dollars invested in advertising, by the price of the product, and by the
level of income of the buyers.

Example 2. The cost of production
it is believed to depend on the number of units produced, and the prices of
factor of production.