Based on Saytzeff’s rule, select the most stable alkene: 1-methylcyclohexene, 3-methylcyclohexene or 4-methylcyclohexene?

The most stable alkene is 1-methylcyclohexene.
The structures of the three compounds are
The most stable alkene is the one that is the most highly substituted.
Structure 1 is trisubstituted. The substituents are ##”CH”_3, “C-3″##, and ##”C-6″##.
Structure 2 is disubstituted. The substituents are ##”C-1″## and ##”C-4″##.
Structure 3 is disubstituted. The substituents are ##”C-2″## and ##”C-5″##.
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So the most stable alkene is Structure 1: 1-methylcyclohexene.