# Intercept

## Intercept :

Intercept in regression analysis refers to the point at which the regression line crosses the y-axis. This is the point at which the predicted value of the dependent variable is zero, even when all predictor variables are at their minimum values.
For example, consider a regression analysis of the relationship between the amount of time spent studying and the final exam score. The intercept in this case would represent the predicted final exam score when no time is spent studying. This could be interpreted as the minimum score that a student could achieve without studying at all.
Another example is a regression analysis of the relationship between the size of a company and its profitability. The intercept in this case would represent the predicted profitability of a company when its size is zero. This could be interpreted as the minimum profitability that a company could achieve without having any size.
In both of these examples, the intercept can provide useful information about the relationship between the predictor and dependent variables. In the first example, the intercept could be used to determine the minimum effort required to achieve a certain exam score, while in the second example, it could be used to determine the minimum size required to achieve a certain level of profitability.
However, it is important to note that the intercept in regression analysis should not be interpreted as a causal relationship between the predictor and dependent variables. For example, in the first example, the intercept does not imply that spending no time studying causes a certain exam score. Instead, it simply represents the predicted value of the dependent variable when the predictor variables are at their minimum values.
Additionally, the intercept in regression analysis can be influenced by the choice of predictor variables. For example, in the second example, the intercept could be influenced by the inclusion or exclusion of other factors that impact a company’s profitability, such as the industry in which it operates or its management team.
Overall, the intercept in regression analysis represents the predicted value of the dependent variable when the predictor variables are at their minimum values. This can provide useful information about the relationship between the predictor and dependent variables, but should not be interpreted as a causal relationship and can be influenced by the choice of predictor variables.