The package includes a function and a dataset.

linear is used to fit simple linear regression models. And it can also returns 95% confidence intervals for one or more parameters in a fitted model.

linear(formula.lm, data)

formula.lm

an object of class "formula" (or one that can be coerced to that class): a symbolic description of the model to be fitted. The details of model specification are given under ‘Details’.

Models for lm are specified symbolically. A typical model has the form response ~ terms where response is the (numeric) response vector and terms is a series of terms which specifies a linear predictor for response.

A formula has an implied intercept term. To remove this use either y ~ x - 1 or y ~ 0 + x.

LM: Fitting linear models (1969) RDocumentation. R-core R-core@R-project.org. Available at: https://www.rdocumentation.org/packages/stats/versions/3.6.2/topics/lm (Accessed: November 20, 2022).