r.regression.line Calculates linear regression from two raster layers : y = a + b*x. Raster (r.*) QgsProcessingParameterRasterLayer|mapx|Layer for x coefficient|None|False QgsProcessingParameterRasterLayer|mapy|Layer for y coefficient|None|False QgsProcessingParameterFileDestination|html|Regression coefficients|Html files (*.html)|report.html|False