regression line regression equation • regression of y on x · · · Info · Definitions · Synonyms · Characters · · regression line · · Text Common · · Latin · · Scripts 15 · · Length 4 · · Syllables Definitions · · · (noun) a smooth curve fitted to the set of paired data in regression analysis; for linear regression the curve is a straight line. Synonyms: regression line, regression curve. · · Noun Definition 1 Synonyms · · · regression curve · · Synonym 1 Characters · · space U+0020 e latin small letter e U+0065 g latin small letter g U+0067 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073