However, there may be circumstances where the relationship between the variables is non-linear (i.e., does not take the shape of a straight line), and we can draw other shaped lines through the ...

One problem involves finding linear and nonlinear regression functions in a scatter plot. The next problem involves simultaneously fitting two lines or curves through a scatter plot. The last problem ...

This assumption is related to the “no outliers” assumption, in that the relationship should be able to be described by a straight line relatively well. These assumptions can be checked using scatter ...