Answer All Questions

$1-$ Define simple regression and discuss its importance in business decision$-$making. Provide examples of how it can be used to analyze relationships between variables in a business context.

$2-$ Explain the roles of the slope and intercept in a simple regression equation. How can these components be interpreted in a real$-$world business scenario, such as predicting sales based on advertising expenditure?

$3-$ Discuss the key assumptions underlying a multiple regression model. Why is it important to ensure these assumptions are met, and what could happen if they are violated?

$4-$ Describe a business problem where multiple regression can be applied.$$