Linear regression model
A simple linear regression model represents a statistical model that relates
one outcome variable called dependent variable to another variable called
independent variable.
In the simple linear regression model it is assumed that the independent
variable "causes" or "explains" 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.
2. The cost of production it is believed to depend on the number of units
produced.