by Jordan Ellenberg to Page 59
The third chapter introduces linear regression, In statistics, linear regression is a linear approach to modeling the relationship between a scalar response and one or more explanatory variables. For example, research shows that if you can raise the average SAT score of your incoming first year by 50 points on average, you can charge $1400 more in tuition. This shows schools with a higher SAT score are likely to be pricier. But sometimes, it is not the case. That is when linear regression is used.