This is not a question concerning the English language, because you would face the same dilemma whether you approach in Russian, Hindi, Swedish or Tagalog. This answer should be answered by a Math professor for 1st year Math students. However, if neither dimensions are specified in terms of x or y, for example, ROI against Investment, we would usually make ROI the vertical axis and Investment the horizontal axis. ![]() In the case of closed-conics: circles and ellipses, there is no difference in plotting vert against horz or horz against vert because there are always two values of v for each value of u, and similarly two values of u for each value of v. Such that there are more than one value of u for every v, but only one value v for every u, it is quite obvious we should be conveniently plotting v against u, regardless of the orientation of their respective axes. For example, quadratic functions and open-curve conics, For higher order graphs, it would be rather obvious what is being plotted against which. In Regression, it can therefore be written as Y a + b X regress Y on X: regress true breeding value on genomic breeding value, etc. Visually, which often would appear mutually indiscriminatable for 1-1 mapping plots. Many times we need to regress a variable (say Y) on another variable (say X). This suggests that if you regress Y on X 2, the regression will suffer from: a. You then regress X 1 on X 2 and find no relationship. You first regress Y on X 1 only and find no relationship. The convention is that x would occupy the horizontal axis, while y occupies the vertical axis, regardless if x is plotted against y, or y against x. Transcribed image text: Consider the multiple regression model with two regressors X 1 and X 2. ![]() OTOH, when mathematically necessary, we would also plot x against y, Which is a mapping of y values against a range of x values related thro the function f(x). Usually, plotting against x is a plot of function f(x) against a horizontal value of x: This question should be asked in the Mathematics department.
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