#### Slope

The slope in a linear regression
model refers to the expected change in the dependent variable as the independent
variable changes one unit.

The interpretation of the slope varies
with the scale of the variables, and the type of transformation applied to each
of the variables involved.

For instance,

- Linear. Variables exhibit no
transformation.
- Semi-log. Either the dependent
variable or the independent variables are transformed using the natural logarithm
transformation.
- Double-log. Variables are transformed
using the natural logarithm transformation.

For additional functional forms see
the concept "Functional forms."