where is the polynomial feature vector that includes all and only the monomials of degree at most $($in this case, since has dimension $,$ this means has components; the degree$-$ component is redundant with the bias term $,$ but that doesn't matter for this problem$).$ What degree would you recommend the biochemist use? Note that this is a soft, not$-$completely$-$mathematical question, much like the question, $$Does Louisiana look more like a boot or a mitten?$\text{'}$ there's consensus here among folks who know the terms involved, even though it's a soft question. Common sense and human experience are important in ML engineering, so this question is fair game.