regression of y on x vs regression analysis

regression of y on x and regression analysis both are nouns.

Word	Noun	Adjective	Verb	Adverb
regression of y on x	Yes	No	No	No
regression analysis	Yes	No	No	No

regression of y on x (noun)	regression analysis (noun)
the equation representing the relation between selected values of one variable (x) and observed values of the other (y); it permits the prediction of the most probable values of y	the use of regression to make quantitative predictions of one variable from the values of another