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When I have data which has one dependent and one independent variable, I can clearly explain it in cartesian coordinate system

enter image description here

here is a regression line when my $y$ approximately equals to $2x + 3$

but what about a second variable ? what if my model was $y = 2x + z +3 $ ? would visualizing it be only possible with a three-dimensional coordinate system ? if it is, what about four and more ? My question might be a bit pointless, thanks in advance.

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  • $\begingroup$ Is it multivariable regression, or multivariate regression. It sounds like the former, but you've used the latter in the question title and tags. $\endgroup$ Jun 12 at 20:30
  • $\begingroup$ @RobertLong I don't know the difference between'em, they mean the same in my lang. $\endgroup$ Jun 12 at 21:13
  • $\begingroup$ @SametSökel ncbi.nlm.nih.gov/pmc/articles/PMC3518362 $\endgroup$
    – Sergio
    Jun 12 at 21:39
  • $\begingroup$ I think you will find the information you need in the linked thread. Please read it. If it isn't what you want / you still have a question afterwards, come back here & edit your question to state what you learned & what you still need to know. Then we can provide the information you need without just duplicating material elsewhere that already didn't help you. $\endgroup$ Jun 12 at 21:55