To perform orthogonal regression
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1    Choose Stat > Regression > Orthogonal Regression.

2    In Response (Y), enter the column containing the response variable.

3    In Predictor (X), enter the column containing the predictor variable.

4    In Error variance ratio (Y/X), enter the ratio of the response error variance to the predictor error variance.

5    If you like, use one or more of the dialog box options, then click OK.