You will have noticed that, in the example library, there is no code at all for the regression_analysis module. This is deliberate.

Back in Chapter 6, Creating Your Own Rust Applications, one of the tasks was to create code that enabled you to perform a regression analysis based on formulae provided. The code created can now be firmly split into two parts:

• The equation for the straight line, y = mx + c, which will also give the intercepts on the x and y axis
• The standard deviation and regression analysis